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560 Births
56 may refer to: * 56 (number) * one of the years 56 BC, AD 56, 1856, 1956, 2056 * 56.com, a Chinese online video platform * Fiftysix, Arkansas, unincorporated community in United States * Fifty-Six, Arkansas, city in United States * "Fifty Six", a song by Karma to Burn from the album ''Arch Stanton'', 2014 * Cityrider 56, a bus route in the United Kingdom {{Numberdis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
56 (number)
56 (fifty-six) is the natural number following 55 and preceding 57. Mathematics 56 is: * The sum of the first six triangular numbers (making it a tetrahedral number). * The number of ways to choose 3 out of 8 objects or 5 out of 8 objects, if order does not matter. * The sum of six consecutive primes (3 + 5 + 7 + 11 + 13 + 17) * a tetranacci number and a pronic number. * a refactorable number, since 8 is one of its 8 divisors. * The sum of the sums of the divisors of the first 8 positive integers. * A semiperfect number, since 56 is twice a perfect number. * A partition number - the number of distinct ways 11 can be represented as the sum of natural numbers. * An Erdős–Woods number, since it is possible to find sequences of 56 consecutive integers such that each inner member shares a factor with either the first or the last member. * The only known number n such that , where φ(''m'') is Euler's totient function and σ(''n'') is the sum of the divisor function, see . ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
