57139494 has 16 divisors (see below), whose sum is σ = 116216640. Its totient is φ = 18723560.

The previous prime is 57139471. The next prime is 57139501. The reversal of 57139494 is 49493175.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80352 + ... + 81059.

It is an arithmetic number, because the mean of its divisors is an integer number (7263540).

Almost surely, 2^57139494 is an apocalyptic number.

57139494 is an abundant number, since it is smaller than the sum of its proper divisors (59077146).

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

57139494 is a wasteful number, since it uses less digits than its factorization.

57139494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161475.

The product of its digits is 136080, while the sum is 42.

The square root of 57139494 is about 7559.0670059208. The cubic root of 57139494 is about 385.1638005425.

The spelling of 57139494 in words is "fifty-seven million, one hundred thirty-nine thousand, four hundred ninety-four".