56569290 has 32 divisors (see below), whose sum is σ = 137298240. Its totient is φ = 14914944.

The previous prime is 56569273. The next prime is 56569291. The reversal of 56569290 is 9296565.

It is a super-2 number, since 2×56569290² = 6400169142208200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56569291) 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, 7924 + ... + 13263.

It is an arithmetic number, because the mean of its divisors is an integer number (4290570).

Almost surely, 2^56569290 is an apocalyptic number.

56569290 is an abundant number, since it is smaller than the sum of its proper divisors (80728950).

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

56569290 is a wasteful number, since it uses less digits than its factorization.

56569290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21286.

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 56569290 is about 7521.2558791734. The cubic root of 56569290 is about 383.8783115933.

The spelling of 56569290 in words is "fifty-six million, five hundred sixty-nine thousand, two hundred ninety".