399516900 has 72 divisors (see below), whose sum is σ = 1206214464. Its totient is φ = 101904000.

The previous prime is 399516883. The next prime is 399516911. The reversal of 399516900 is 9615993.

It is a super-2 number, since 2×399516900² = 319227506771220000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22051 + ... + 35850.

Almost surely, 2^399516900 is an apocalyptic number.

399516900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

399516900 is an abundant number, since it is smaller than the sum of its proper divisors (806697564).

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

399516900 is a wasteful number, since it uses less digits than its factorization.

399516900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57941 (or 57934 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 399516900 is about 19987.9188511461. The cubic root of 399516900 is about 736.5095542951.

The spelling of 399516900 in words is "three hundred ninety-nine million, five hundred sixteen thousand, nine hundred".