57998820 has 48 divisors (see below), whose sum is σ = 177162048. Its totient is φ = 14060160.

The previous prime is 57998803. The next prime is 57998827. The reversal of 57998820 is 2889975.

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 57998820.

It is not an unprimeable number, because it can be changed into a prime (57998827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43279 + ... + 44598.

It is an arithmetic number, because the mean of its divisors is an integer number (3690876).

Almost surely, 2^57998820 is an apocalyptic number.

It is an amenable number.

57998820 is an abundant number, since it is smaller than the sum of its proper divisors (119163228).

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

57998820 is a wasteful number, since it uses less digits than its factorization.

57998820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87900 (or 87898 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 57998820 is about 7615.6956346745. The cubic root of 57998820 is about 387.0850389677.

It can be divided in two parts, 579 and 98820, that added together give a palindrome (99399).

The spelling of 57998820 in words is "fifty-seven million, nine hundred ninety-eight thousand, eight hundred twenty".