56815588 has 12 divisors (see below), whose sum is σ = 99933372. Its totient is φ = 28263200.

The previous prime is 56815579. The next prime is 56815601. The reversal of 56815588 is 88551865.

It can be written as a sum of positive squares in 2 ways, for example, as 36457444 + 20358144 = 6038^2 + 4512^2 .

It is a super-2 number, since 2×56815588² = 6456022079571488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35263 + ... + 36838.

It is an arithmetic number, because the mean of its divisors is an integer number (8327781).

Almost surely, 2^56815588 is an apocalyptic number.

It is an amenable number.

56815588 is a deficient number, since it is larger than the sum of its proper divisors (43117784).

56815588 is a wasteful number, since it uses less digits than its factorization.

56815588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72302 (or 72300 counting only the distinct ones).

The product of its digits is 384000, while the sum is 46.

The square root of 56815588 is about 7537.6115580468. The cubic root of 56815588 is about 384.4346297689.

The spelling of 56815588 in words is "fifty-six million, eight hundred fifteen thousand, five hundred eighty-eight".