57139056 has 120 divisors (see below), whose sum is σ = 174270096. Its totient is φ = 17372160.

The previous prime is 57139039. The next prime is 57139079. The reversal of 57139056 is 65093175.

It is a happy number.

57139056 is a `hidden beast` number, since 571 + 39 + 0 + 56 = 666.

It is a super-2 number, since 2×57139056² = 6529743441142272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 57139056.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245116 + ... + 245348.

Almost surely, 2^57139056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57139056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87135048).

57139056 is an abundant number, since it is smaller than the sum of its proper divisors (117131040).

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

57139056 is a wasteful number, since it uses less digits than its factorization.

57139056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 57139056 is about 7559.0380340358. The cubic root of 57139056 is about 385.1628163886.

The spelling of 57139056 in words is "fifty-seven million, one hundred thirty-nine thousand, fifty-six".