55728032 has 24 divisors (see below), whose sum is σ = 110025216. Its totient is φ = 27785152.

The previous prime is 55728017. The next prime is 55728059. The reversal of 55728032 is 23082755.

It is a super-2 number, since 2×55728032² = 6211227101186048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 55728032.

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, 9983 + ... + 14529.

It is an arithmetic number, because the mean of its divisors is an integer number (4584384).

Almost surely, 2^55728032 is an apocalyptic number.

It is an amenable number.

55728032 is a deficient number, since it is larger than the sum of its proper divisors (54297184).

55728032 is a wasteful number, since it uses less digits than its factorization.

55728032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4940 (or 4932 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 55728032 is about 7465.1210304991. The cubic root of 55728032 is about 381.9658787355.

The spelling of 55728032 in words is "fifty-five million, seven hundred twenty-eight thousand, thirty-two".