56564240 has 20 divisors (see below), whose sum is σ = 131512044. Its totient is φ = 22625664.

The previous prime is 56564227. The next prime is 56564257. The reversal of 56564240 is 4246565.

It can be written as a sum of positive squares in 2 ways, for example, as 18421264 + 38142976 = 4292^2 + 6176^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 56564197 and 56564206.

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, 353447 + ... + 353606.

Almost surely, 2^56564240 is an apocalyptic number.

It is an amenable number.

56564240 is an abundant number, since it is smaller than the sum of its proper divisors (74947804).

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

56564240 is a wasteful number, since it uses less digits than its factorization.

56564240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707066 (or 707060 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 56564240 is about 7520.9201564702. The cubic root of 56564240 is about 383.8668881799.

The spelling of 56564240 in words is "fifty-six million, five hundred sixty-four thousand, two hundred forty".