57031398 has 64 divisors (see below), whose sum is σ = 135198720. Its totient is φ = 17778816.

The previous prime is 57031397. The next prime is 57031411. The reversal of 57031398 is 89313075.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57031397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57886 + ... + 58862.

It is an arithmetic number, because the mean of its divisors is an integer number (2112480).

Almost surely, 2^57031398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57031398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67599360).

57031398 is an abundant number, since it is smaller than the sum of its proper divisors (78167322).

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

57031398 is a wasteful number, since it uses less digits than its factorization.

57031398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 1052 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 57031398 is about 7551.9135323440. The cubic root of 57031398 is about 384.9207640389.

The spelling of 57031398 in words is "fifty-seven million, thirty-one thousand, three hundred ninety-eight".