56921644 has 48 divisors (see below), whose sum is σ = 119599200. Its totient is φ = 23417856.

The previous prime is 56921621. The next prime is 56921687. The reversal of 56921644 is 44612965.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15102 + ... + 18490.

It is an arithmetic number, because the mean of its divisors is an integer number (2491650).

Almost surely, 2^56921644 is an apocalyptic number.

It is an amenable number.

56921644 is an abundant number, since it is smaller than the sum of its proper divisors (62677556).

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

56921644 is a wasteful number, since it uses less digits than its factorization.

56921644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3442 (or 3440 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 56921644 is about 7544.6433978022. The cubic root of 56921644 is about 384.6736853858.

The spelling of 56921644 in words is "fifty-six million, nine hundred twenty-one thousand, six hundred forty-four".