399625904 has 20 divisors (see below), whose sum is σ = 774694464. Its totient is φ = 199704768.

The previous prime is 399625873. The next prime is 399625907. The reversal of 399625904 is 409526993.

It is not an unprimeable number, because it can be changed into a prime (399625907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29654 + ... + 40970.

Almost surely, 2^399625904 is an apocalyptic number.

It is an amenable number.

399625904 is a deficient number, since it is larger than the sum of its proper divisors (375068560).

399625904 is a wasteful number, since it uses less digits than its factorization.

399625904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13532 (or 13526 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 399625904 is about 19990.6454122922. The cubic root of 399625904 is about 736.5765311757.

The spelling of 399625904 in words is "three hundred ninety-nine million, six hundred twenty-five thousand, nine hundred four".