57128328 has 48 divisors (see below), whose sum is σ = 160458480. Its totient is φ = 19042128.

The previous prime is 57128311. The next prime is 57128339. The reversal of 57128328 is 82382175.

57128328 is a `hidden beast` number, since 571 + 2 + 83 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 57128292 and 57128301.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12750 + ... + 16637.

It is an arithmetic number, because the mean of its divisors is an integer number (3342885).

Almost surely, 2^57128328 is an apocalyptic number.

It is an amenable number.

57128328 is an abundant number, since it is smaller than the sum of its proper divisors (103330152).

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

57128328 is a wasteful number, since it uses less digits than its factorization.

57128328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29408 (or 29392 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 57128328 is about 7558.3283866209. The cubic root of 57128328 is about 385.1387097873.

The spelling of 57128328 in words is "fifty-seven million, one hundred twenty-eight thousand, three hundred twenty-eight".