57138744 has 64 divisors (see below), whose sum is σ = 157449600. Its totient is φ = 17168256.

The previous prime is 57138721. The next prime is 57138791. The reversal of 57138744 is 44783175.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11287 + ... + 15545.

It is an arithmetic number, because the mean of its divisors is an integer number (2460150).

Almost surely, 2^57138744 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 57138744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78724800).

57138744 is an abundant number, since it is smaller than the sum of its proper divisors (100310856).

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

57138744 is a wasteful number, since it uses less digits than its factorization.

57138744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324 (or 4320 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 57138744 is about 7559.0173964610. The cubic root of 57138744 is about 385.1621153443.

The spelling of 57138744 in words is "fifty-seven million, one hundred thirty-eight thousand, seven hundred forty-four".