In number theory, a practical number or panarithmic number is a positive integer n {\displaystyle n} such that all smaller positive integers can be represented...

natural number that follows 41 and precedes 43. 42 is a pronic number, an abundant number as well as a highly abundant number, a practical number, an admirable...

Thus every even perfect number is a pernicious number. Every even perfect number is also a practical number (cf. Related concepts). Unsolved...

Except for 2, all primary pseudoperfect numbers are semiperfect. Every practical number that is not a power of two is semiperfect. The natural density of the...

(positive only) values with a Gaussian distribution; however When using practical number representations, the infinite "tails" of the distribution have to be...

even composite number, a highly composite number, an abundant number, a practical number, and a congruent number. The many ways 24 can be constructed inspired...

following 233 and preceding 235. Additionally: 234 is a practical number and an abundant number. There are 234 ways of grouping six children into rings...

natural number following 207 and preceding 209. 208 is a practical number, a tetranacci number, a rhombic matchstick number, a happy number, and a member...

making it an amicable number with 284. Every number up to 220 may be expressed as a sum of its divisors, making 220 a practical number. It is the sum of four...

semiperfect number. These proper divisors can be summed in various ways to express all positive integers smaller than 54, so 54 is a practical number as well...

consequences of 180 having so many divisors is that it is a practical number, meaning that any positive number smaller than 180 that is not a divisor of 180 can...

(a number all of whose digits are equal), and 888 = 24 × 37. {\displaystyle 888=24\times 37.} Where 37 is the 12th prime number. 888 is a practical number...

factorization of a highly composite number uses all of the first k primes, every highly composite number must be a practical number. Due to their ease of use in...

Idoneal number. 312 is a Harshad number, as it is divisible by the sum of its digits. 312 is a Pythagorean triple. 312 is a practical number. "A000926...

hundred [and] twenty-four) is the natural number following 223 and preceding 225. 224 is a practical number, and a sum of two positive cubes 23 + 63....

semiperfect number, and a practical number. 176 is a cake number, a happy number, a pentagonal number, and an octagonal number. 15 can be partitioned in...

semiperfect number, as it is smaller than the sum of its proper divisors yet equal to the sum of a subset of its proper divisors. It is a practical number as each...

twenty-eight) is the natural number following 227 and preceding 229. 228 is a refactorable number and a practical number. There are 228 matchings in a...

simplest way to represent the natural numbers, base-1 is rarely used as a practical base for counting due to its difficult readability. In many mathematical...

Old Possum's Book of Practical Cats (1939) is a collection of whimsical light poems by T. S. Eliot about feline psychology and sociology, published by...

forty) is the natural number following 839 and preceding 841. It is an even number. It is a practical number. It is a congruent number. It is the 15th highly...

Practical Television, later known as Television and subsequently Television & Consumer Electronics, was a UK magazine for the electronics/TV servicing...

1^{3}+2^{3}+3^{3}+6^{3}=(1^{3}+2^{3})(1^{3}+3^{3})=252.} a practical number, a refactorable number, a hexagonal pyramidal number. a member of the Mian-Chowla sequence. There...

Practical Ethics, a 1979 book by the moral philosopher Peter Singer, is an introduction to applied ethics. Singer analyzes, in detail, why and how beings'...

coax cables have a maximum length of 185 metres (607 ft). The maximum practical number of nodes that can be connected to a 10BASE2 segment is limited to 30...

composite number, the 2nd colossally abundant number, the 3rd triangular number, the 4th highly composite number, a pronic number, a congruent number, a harmonic...

foreign language in the world. Most people learning English do so for practical reasons, as opposed to ideological reasons. In EU countries, English is...

A licensed practical nurse (LPN), in much of the United States and Canada, is a nurse who provides direct nursing care for people who are sick, injured...

other symbols. 0 (zero) is a number representing an empty quantity. Adding (or subtracting) 0 to any number leaves that number unchanged; in mathematical...

Practical Law, a division of West Publishing Corporation, is a legal publishing company which provides legal know-how for business lawyers. It also acts...