56569856 has 52 divisors (see below), whose sum is σ = 129352272. Its totient is φ = 24231936.

The previous prime is 56569847. The next prime is 56569867. The reversal of 56569856 is 65896565.

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

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, 27686 + ... + 29658.

Almost surely, 2^56569856 is an apocalyptic number.

56569856 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56569856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64676136).

56569856 is an abundant number, since it is smaller than the sum of its proper divisors (72782416).

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

56569856 is an equidigital number, since it uses as much as digits as its factorization.

56569856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004 (or 1982 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 50.

The square root of 56569856 is about 7521.2935057741. The cubic root of 56569856 is about 383.8795918781.

The spelling of 56569856 in words is "fifty-six million, five hundred sixty-nine thousand, eight hundred fifty-six".