557918238 has 16 divisors (see below), whose sum is σ = 1116709776. Its totient is φ = 185827200.

The previous prime is 557918233. The next prime is 557918279. The reversal of 557918238 is 832819755.

It is a super-2 number, since 2×557918238² = 622545520586049288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557918233) 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, 27931 + ... + 43542.

It is an arithmetic number, because the mean of its divisors is an integer number (69794361).

Almost surely, 2^557918238 is an apocalyptic number.

557918238 is an abundant number, since it is smaller than the sum of its proper divisors (558791538).

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

557918238 is a wasteful number, since it uses less digits than its factorization.

557918238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72779.

The product of its digits is 604800, while the sum is 48.

The square root of 557918238 is about 23620.2929279042. The cubic root of 557918238 is about 823.2344184833.

The spelling of 557918238 in words is "five hundred fifty-seven million, nine hundred eighteen thousand, two hundred thirty-eight".