57911690 has 16 divisors (see below), whose sum is σ = 110373192. Its totient is φ = 21801984.

The previous prime is 57911663. The next prime is 57911699. The reversal of 57911690 is 9611975.

It can be written as a sum of positive squares in 4 ways, for example, as 51825601 + 6086089 = 7199^2 + 2467^2 .

It is a super-2 number, since 2×57911690² = 6707527677312200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57911699) 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, 170159 + ... + 170498.

Almost surely, 2^57911690 is an apocalyptic number.

57911690 is a deficient number, since it is larger than the sum of its proper divisors (52461502).

57911690 is a wasteful number, since it uses less digits than its factorization.

57911690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340681.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 57911690 is about 7609.9730617132. The cubic root of 57911690 is about 386.8911061575.

The spelling of 57911690 in words is "fifty-seven million, nine hundred eleven thousand, six hundred ninety".