55875728 has 10 divisors (see below), whose sum is σ = 108259254. Its totient is φ = 27937856.

The previous prime is 55875709. The next prime is 55875731. The reversal of 55875728 is 82757855.

It can be written as a sum of positive squares in only one way, i.e., 55830784 + 44944 = 7472^2 + 212^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1746101 + ... + 1746132.

Almost surely, 2^55875728 is an apocalyptic number.

It is an amenable number.

55875728 is a deficient number, since it is larger than the sum of its proper divisors (52383526).

55875728 is a wasteful number, since it uses less digits than its factorization.

55875728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492241 (or 3492235 counting only the distinct ones).

The product of its digits is 784000, while the sum is 47.

The square root of 55875728 is about 7475.0068896289. The cubic root of 55875728 is about 382.3030224488.

The spelling of 55875728 in words is "fifty-five million, eight hundred seventy-five thousand, seven hundred twenty-eight".