57139704 has 24 divisors (see below), whose sum is σ = 154753560. Its totient is φ = 19046544.

The previous prime is 57139699. The next prime is 57139741. The reversal of 57139704 is 40793175.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 396732 + ... + 396875.

It is an arithmetic number, because the mean of its divisors is an integer number (6448065).

Almost surely, 2^57139704 is an apocalyptic number.

It is an amenable number.

57139704 is an abundant number, since it is smaller than the sum of its proper divisors (97613856).

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

57139704 is a wasteful number, since it uses less digits than its factorization.

57139704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793619 (or 793612 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 57139704 is about 7559.0808965112. The cubic root of 57139704 is about 385.1642723954.

The spelling of 57139704 in words is "fifty-seven million, one hundred thirty-nine thousand, seven hundred four".