557988 has 12 divisors (see below), whose sum is σ = 1302000. Its totient is φ = 185992.

The previous prime is 557987. The next prime is 558007. The reversal of 557988 is 889755.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×557988² = 622701216288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (557981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23238 + ... + 23261.

It is an arithmetic number, because the mean of its divisors is an integer number (108500).

2⁵⁵⁷⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

557988 is an abundant number, since it is smaller than the sum of its proper divisors (744012).

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

557988 is a wasteful number, since it uses less digits than its factorization.

557988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46506 (or 46504 counting only the distinct ones).

The product of its digits is 100800, while the sum is 42.

The square root of 557988 is about 746.9859436429. The cubic root of 557988 is about 82.3268729416.

The spelling of 557988 in words is "five hundred fifty-seven thousand, nine hundred eighty-eight".