57139992 has 384 divisors, whose sum is σ = 220147200. Its totient is φ = 13436928.

The previous prime is 57139961. The next prime is 57140021. The reversal of 57139992 is 29993175.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3007359 + ... + 3007377.

It is an arithmetic number, because the mean of its divisors is an integer number (573300).

Almost surely, 2^57139992 is an apocalyptic number.

57139992 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57139992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110073600).

57139992 is an abundant number, since it is smaller than the sum of its proper divisors (163007208).

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

57139992 is a wasteful number, since it uses less digits than its factorization.

57139992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 61 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 57139992 is about 7559.0999464222. The cubic root of 57139992 is about 385.1649195060.

The spelling of 57139992 in words is "fifty-seven million, one hundred thirty-nine thousand, nine hundred ninety-two".