557639268 has 24 divisors (see below), whose sum is σ = 1301690880. Its totient is φ = 185803680.

The previous prime is 557639261. The next prime is 557639317. The reversal of 557639268 is 862936755.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 557639268.

It is not an unprimeable number, because it can be changed into a prime (557639261) 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, 26478 + ... + 42618.

It is an arithmetic number, because the mean of its divisors is an integer number (54237120).

Almost surely, 2^557639268 is an apocalyptic number.

It is an amenable number.

557639268 is an abundant number, since it is smaller than the sum of its proper divisors (744051612).

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

557639268 is a wasteful number, since it uses less digits than its factorization.

557639268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19027 (or 19025 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The square root of 557639268 is about 23614.3868859642. The cubic root of 557639268 is about 823.0971845193.

It can be divided in two parts, 5576 and 39268, that added together give a palindrome (44844).

The spelling of 557639268 in words is "five hundred fifty-seven million, six hundred thirty-nine thousand, two hundred sixty-eight".