56216644 has 12 divisors (see below), whose sum is σ = 107322768. Its totient is φ = 25553000.

The previous prime is 56216639. The next prime is 56216651. The reversal of 56216644 is 44661265.

It is a super-2 number, since 2×56216644² = 6320622125245472, which contains 22 as substring.

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, 638782 + ... + 638869.

It is an arithmetic number, because the mean of its divisors is an integer number (8943564).

Almost surely, 2^56216644 is an apocalyptic number.

It is an amenable number.

56216644 is a deficient number, since it is larger than the sum of its proper divisors (51106124).

56216644 is a wasteful number, since it uses less digits than its factorization.

56216644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277666 (or 1277664 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 56216644 is about 7497.7759369029. The cubic root of 56216644 is about 383.0789648735.

The spelling of 56216644 in words is "fifty-six million, two hundred sixteen thousand, six hundred forty-four".