399604764 has 48 divisors (see below), whose sum is σ = 1005401600. Its totient is φ = 122800320.

The previous prime is 399604753. The next prime is 399604837. The reversal of 399604764 is 467406993.

It is a super-2 number, since 2×399604764² = 319367934822991392, 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 15 ways as a sum of consecutive naturals, for example, 217329 + ... + 219159.

Almost surely, 2^399604764 is an apocalyptic number.

It is an amenable number.

399604764 is an abundant number, since it is smaller than the sum of its proper divisors (605796836).

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

399604764 is a wasteful number, since it uses less digits than its factorization.

399604764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 399604764 is about 19990.1166579888. The cubic root of 399604764 is about 736.5635427764.

The spelling of 399604764 in words is "three hundred ninety-nine million, six hundred four thousand, seven hundred sixty-four".