56857256 has 8 divisors (see below), whose sum is σ = 106607370. Its totient is φ = 28428624.

The previous prime is 56857217. The next prime is 56857261. The reversal of 56857256 is 65275865.

It can be written as a sum of positive squares in only one way, i.e., 56761156 + 96100 = 7534^2 + 310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3553571 + ... + 3553586.

Almost surely, 2^56857256 is an apocalyptic number.

56857256 is the 4031-st centered heptagonal number.

It is an amenable number.

56857256 is a deficient number, since it is larger than the sum of its proper divisors (49750114).

56857256 is a wasteful number, since it uses less digits than its factorization.

56857256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7107163 (or 7107159 counting only the distinct ones).

The product of its digits is 504000, while the sum is 44.

The square root of 56857256 is about 7540.3750569849. The cubic root of 56857256 is about 384.5285870105.

The spelling of 56857256 in words is "fifty-six million, eight hundred fifty-seven thousand, two hundred fifty-six".