56857656 has 128 divisors (see below), whose sum is σ = 161118720. Its totient is φ = 16625664.

The previous prime is 56857649. The next prime is 56857657. The reversal of 56857656 is 65675865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56857657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 684991 + ... + 685073.

It is an arithmetic number, because the mean of its divisors is an integer number (1258740).

Almost surely, 2^56857656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56857656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80559360).

56857656 is an abundant number, since it is smaller than the sum of its proper divisors (104261064).

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

56857656 is a wasteful number, since it uses less digits than its factorization.

56857656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 201 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 48.

The square root of 56857656 is about 7540.4015808178. The cubic root of 56857656 is about 384.5294887486.

The spelling of 56857656 in words is "fifty-six million, eight hundred fifty-seven thousand, six hundred fifty-six".