557998918 has 8 divisors (see below), whose sum is σ = 865860480. Its totient is φ = 269378760.

The previous prime is 557998913. The next prime is 557998921. The reversal of 557998918 is 819899755.

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

It is a super-2 number, since 2×557998918² = 622725584978341448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557998913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4810278 + ... + 4810393.

It is an arithmetic number, because the mean of its divisors is an integer number (108232560).

Almost surely, 2^557998918 is an apocalyptic number.

557998918 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

557998918 is a deficient number, since it is larger than the sum of its proper divisors (307861562).

557998918 is a wasteful number, since it uses less digits than its factorization.

557998918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9620702.

The product of its digits is 8164800, while the sum is 61.

The square root of 557998918 is about 23622.0007196681. Note that the first 3 decimals coincide. The cubic root of 557998918 is about 823.2740989400.

The spelling of 557998918 in words is "five hundred fifty-seven million, nine hundred ninety-eight thousand, nine hundred eighteen".