57939990 has 64 divisors (see below), whose sum is σ = 146437632. Its totient is φ = 14643200.

The previous prime is 57939989. The next prime is 57940007. The reversal of 57939990 is 9993975.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90070 + ... + 90710.

It is an arithmetic number, because the mean of its divisors is an integer number (2288088).

Almost surely, 2^57939990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57939990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73218816).

57939990 is an abundant number, since it is smaller than the sum of its proper divisors (88497642).

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

57939990 is a wasteful number, since it uses less digits than its factorization.

57939990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 688905, while the sum is 51.

The square root of 57939990 is about 7611.8322367220. The cubic root of 57939990 is about 386.9541172426.

The spelling of 57939990 in words is "fifty-seven million, nine hundred thirty-nine thousand, nine hundred ninety".