56721802 has 16 divisors (see below), whose sum is σ = 90453600. Its totient is φ = 26600400.

The previous prime is 56721799. The next prime is 56721811. The reversal of 56721802 is 20812765.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3552 + ... + 11227.

It is an arithmetic number, because the mean of its divisors is an integer number (5653350).

Almost surely, 2^56721802 is an apocalyptic number.

56721802 is a deficient number, since it is larger than the sum of its proper divisors (33731798).

56721802 is a wasteful number, since it uses less digits than its factorization.

56721802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14901.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 56721802 is about 7531.3877871213. The cubic root of 56721802 is about 384.2229833750. Note that the first 3 decimals are identical.

The spelling of 56721802 in words is "fifty-six million, seven hundred twenty-one thousand, eight hundred two".