56515880 has 32 divisors (see below), whose sum is σ = 133855200. Its totient is φ = 21416256.

The previous prime is 56515859. The next prime is 56515897. The reversal of 56515880 is 8851565.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36422 + ... + 37941.

It is an arithmetic number, because the mean of its divisors is an integer number (4182975).

Almost surely, 2^56515880 is an apocalyptic number.

It is an amenable number.

56515880 is an abundant number, since it is smaller than the sum of its proper divisors (77339320).

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

56515880 is a wasteful number, since it uses less digits than its factorization.

56515880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74393 (or 74389 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 38.

The square root of 56515880 is about 7517.7044368610. The cubic root of 56515880 is about 383.7574604116.

The spelling of 56515880 in words is "fifty-six million, five hundred fifteen thousand, eight hundred eighty".