57921018 has 16 divisors (see below), whose sum is σ = 115939296. Its totient is φ = 19290800.

The previous prime is 57921013. The next prime is 57921029. The reversal of 57921018 is 81012975.

It is a self number, because there is not a number n which added to its sum of digits gives 57921018.

It is not an unprimeable number, because it can be changed into a prime (57921013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5380 + ... + 12032.

It is an arithmetic number, because the mean of its divisors is an integer number (7246206).

Almost surely, 2^57921018 is an apocalyptic number.

57921018 is an abundant number, since it is smaller than the sum of its proper divisors (58018278).

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

57921018 is a wasteful number, since it uses less digits than its factorization.

57921018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8109.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 57921018 is about 7610.5859169975. The cubic root of 57921018 is about 386.9118775912.

The spelling of 57921018 in words is "fifty-seven million, nine hundred twenty-one thousand, eighteen".