57128855 has 24 divisors (see below), whose sum is σ = 80151120. Its totient is φ = 38976000.

The previous prime is 57128843. The next prime is 57128873. The reversal of 57128855 is 55882175.

It is a de Polignac number, because none of the positive numbers 2^k-57128855 is a prime.

It is a super-2 number, since 2×57128855² = 6527412147222050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61031 + ... + 61959.

It is an arithmetic number, because the mean of its divisors is an integer number (3339630).

Almost surely, 2^57128855 is an apocalyptic number.

57128855 is a deficient number, since it is larger than the sum of its proper divisors (23022265).

57128855 is a wasteful number, since it uses less digits than its factorization.

57128855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199 (or 1192 counting only the distinct ones).

The product of its digits is 112000, while the sum is 41.

The square root of 57128855 is about 7558.3632487464. The cubic root of 57128855 is about 385.1398940653.

The spelling of 57128855 in words is "fifty-seven million, one hundred twenty-eight thousand, eight hundred fifty-five".