56642728 has 16 divisors (see below), whose sum is σ = 106555680. Its totient is φ = 28227888.

The previous prime is 56642717. The next prime is 56642731. The reversal of 56642728 is 82724665.

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, 9076 + ... + 13987.

It is an arithmetic number, because the mean of its divisors is an integer number (6659730).

Almost surely, 2^56642728 is an apocalyptic number.

It is an amenable number.

56642728 is a deficient number, since it is larger than the sum of its proper divisors (49912952).

56642728 is a wasteful number, since it uses less digits than its factorization.

56642728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23376 (or 23372 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 56642728 is about 7526.1363261636. The cubic root of 56642728 is about 384.0443561320.

The spelling of 56642728 in words is "fifty-six million, six hundred forty-two thousand, seven hundred twenty-eight".