57871138 has 16 divisors (see below), whose sum is σ = 93615480. Its totient is φ = 26672256.

The previous prime is 57871133. The next prime is 57871139. The reversal of 57871138 is 83117875.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 51022449 + 6848689 = 7143^2 + 2617^2 .

It is a super-2 number, since 2×57871138² = 6698137226830088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57871138.

It is not an unprimeable number, because it can be changed into a prime (57871133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27508 + ... + 29536.

Almost surely, 2^57871138 is an apocalyptic number.

57871138 is a deficient number, since it is larger than the sum of its proper divisors (35744342).

57871138 is a wasteful number, since it uses less digits than its factorization.

57871138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141.

The product of its digits is 47040, while the sum is 40.

The square root of 57871138 is about 7607.3081967277. The cubic root of 57871138 is about 386.8007797103.

The spelling of 57871138 in words is "fifty-seven million, eight hundred seventy-one thousand, one hundred thirty-eight".