56257656 has 64 divisors (see below), whose sum is σ = 173107200. Its totient is φ = 14836608.

The previous prime is 56257639. The next prime is 56257661. The reversal of 56257656 is 65675265.

It is a happy number.

It is a super-2 number, since 2×56257656² = 6329847717228672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10696 + ... + 15063.

It is an arithmetic number, because the mean of its divisors is an integer number (2704800).

Almost surely, 2^56257656 is an apocalyptic number.

56257656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

56257656 is an abundant number, since it is smaller than the sum of its proper divisors (116849544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56257656 is a wasteful number, since it uses less digits than its factorization.

56257656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25788 (or 25784 counting only the distinct ones).

The product of its digits is 378000, while the sum is 42.

The square root of 56257656 is about 7500.5103826340. The cubic root of 56257656 is about 383.1720987119.

The spelling of 56257656 in words is "fifty-six million, two hundred fifty-seven thousand, six hundred fifty-six".