557998 has 8 divisors (see below), whose sum is σ = 956592. Its totient is φ = 239136.

The previous prime is 557987. The next prime is 558007. The reversal of 557998 is 899755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×557998² = 622723536008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19915 + ... + 19942.

It is an arithmetic number, because the mean of its divisors is an integer number (119574).

2⁵⁵⁷⁹⁹⁸ is an apocalyptic number.

557998 is a deficient number, since it is larger than the sum of its proper divisors (398594).

557998 is a wasteful number, since it uses less digits than its factorization.

557998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39866.

The product of its digits is 113400, while the sum is 43.

The square root of 557998 is about 746.9926371792. The cubic root of 557998 is about 82.3273647466.

The spelling of 557998 in words is "five hundred fifty-seven thousand, nine hundred ninety-eight".