57438731 has 12 divisors (see below), whose sum is σ = 67572360. Its totient is φ = 48676320.

The previous prime is 57438707. The next prime is 57438737. The reversal of 57438731 is 13783475.

57438731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57438731 - 2²² = 53244427 is a prime.

It is a super-2 number, since 2×57438731² = 6598415637780722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57438737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2225 + ... + 10946.

It is an arithmetic number, because the mean of its divisors is an integer number (5631030).

Almost surely, 2^57438731 is an apocalyptic number.

57438731 is a deficient number, since it is larger than the sum of its proper divisors (10133629).

57438731 is a wasteful number, since it uses less digits than its factorization.

57438731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13274 (or 13267 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 57438731 is about 7578.8344090632. The cubic root of 57438731 is about 385.8349921585.

The spelling of 57438731 in words is "fifty-seven million, four hundred thirty-eight thousand, seven hundred thirty-one".