56563780 has 48 divisors (see below), whose sum is σ = 146200320. Its totient is φ = 17900928.

The previous prime is 56563757. The next prime is 56563781. The reversal of 56563780 is 8736565.

It is a super-2 number, since 2×56563780² = 6398922415776800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (56563781) 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, 13720 + ... + 17359.

It is an arithmetic number, because the mean of its divisors is an integer number (3045840).

Almost surely, 2^56563780 is an apocalyptic number.

It is an amenable number.

56563780 is an abundant number, since it is smaller than the sum of its proper divisors (89636540).

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

56563780 is a wasteful number, since it uses less digits than its factorization.

56563780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31108 (or 31106 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 56563780 is about 7520.8895750436. The cubic root of 56563780 is about 383.8658475975.

The spelling of 56563780 in words is "fifty-six million, five hundred sixty-three thousand, seven hundred eighty".