56917590 has 32 divisors (see below), whose sum is σ = 137687040. Its totient is φ = 15057504.

The previous prime is 56917577. The next prime is 56917591. The reversal of 56917590 is 9571965.

It is a super-2 number, since 2×56917590² = 6479224102816200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56917591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3660 + ... + 11279.

It is an arithmetic number, because the mean of its divisors is an integer number (4302720).

Almost surely, 2^56917590 is an apocalyptic number.

56917590 is an abundant number, since it is smaller than the sum of its proper divisors (80769450).

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

56917590 is a wasteful number, since it uses less digits than its factorization.

56917590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15076.

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 56917590 is about 7544.3747255820. The cubic root of 56917590 is about 384.6645529244.

The spelling of 56917590 in words is "fifty-six million, nine hundred seventeen thousand, five hundred ninety".