57128620 has 12 divisors (see below), whose sum is σ = 119970144. Its totient is φ = 22851440.

The previous prime is 57128609. The next prime is 57128623. The reversal of 57128620 is 2682175.

It is not an unprimeable number, because it can be changed into a prime (57128623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428196 + ... + 1428235.

It is an arithmetic number, because the mean of its divisors is an integer number (9997512).

Almost surely, 2^57128620 is an apocalyptic number.

It is an amenable number.

57128620 is an abundant number, since it is smaller than the sum of its proper divisors (62841524).

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

57128620 is a wasteful number, since it uses less digits than its factorization.

57128620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856440 (or 2856438 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 57128620 is about 7558.3477030367. The cubic root of 57128620 is about 385.1393659726.

The spelling of 57128620 in words is "fifty-seven million, one hundred twenty-eight thousand, six hundred twenty".