56615730 has 32 divisors (see below), whose sum is σ = 138772224. Its totient is φ = 14775936.

The previous prime is 56615723. The next prime is 56615761. The reversal of 56615730 is 3751665.

It is a junction number, because it is equal to n+sod(n) for n = 56615691 and 56615700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18667 + ... + 21486.

It is an arithmetic number, because the mean of its divisors is an integer number (4336632).

Almost surely, 2^56615730 is an apocalyptic number.

56615730 is an abundant number, since it is smaller than the sum of its proper divisors (82156494).

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

56615730 is a wasteful number, since it uses less digits than its factorization.

56615730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40210.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 56615730 is about 7524.3424961919. The cubic root of 56615730 is about 383.9833298970.

The spelling of 56615730 in words is "fifty-six million, six hundred fifteen thousand, seven hundred thirty".