57731628 has 48 divisors (see below), whose sum is σ = 140507136. Its totient is φ = 18432960.

The previous prime is 57731627. The next prime is 57731629. The reversal of 57731628 is 82613775.

57731628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (57731627) and next prime (57731629).

It is not an unprimeable number, because it can be changed into a prime (57731621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26293 + ... + 28403.

It is an arithmetic number, because the mean of its divisors is an integer number (2927232).

Almost surely, 2^57731628 is an apocalyptic number.

It is an amenable number.

57731628 is an abundant number, since it is smaller than the sum of its proper divisors (82775508).

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

57731628 is a wasteful number, since it uses less digits than its factorization.

57731628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214 (or 2212 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 57731628 is about 7598.1331917781. The cubic root of 57731628 is about 386.4897092910.

The spelling of 57731628 in words is "fifty-seven million, seven hundred thirty-one thousand, six hundred twenty-eight".