399986304 has 64 divisors (see below), whose sum is σ = 1096769280. Its totient is φ = 129024000.

The previous prime is 399986297. The next prime is 399986341. The reversal of 399986304 is 403689993.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4897 + ... + 28704.

It is an arithmetic number, because the mean of its divisors is an integer number (17137020).

Almost surely, 2^399986304 is an apocalyptic number.

It is an amenable number.

399986304 is an abundant number, since it is smaller than the sum of its proper divisors (696782976).

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

399986304 is a wasteful number, since it uses less digits than its factorization.

399986304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33649 (or 33637 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 51.

The square root of 399986304 is about 19999.6575970690. The cubic root of 399986304 is about 736.7978902162.

The spelling of 399986304 in words is "three hundred ninety-nine million, nine hundred eighty-six thousand, three hundred four".