399211904 has 64 divisors (see below), whose sum is σ = 978865440. Its totient is φ = 157925376.

The previous prime is 399211873. The next prime is 399211931. The reversal of 399211904 is 409112993.

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

It is a congruent number.

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, 5489 + ... + 28784.

Almost surely, 2^399211904 is an apocalyptic number.

It is an amenable number.

399211904 is an abundant number, since it is smaller than the sum of its proper divisors (579653536).

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

399211904 is a wasteful number, since it uses less digits than its factorization.

399211904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34307 (or 34295 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 399211904 is about 19980.2878858139. The cubic root of 399211904 is about 736.3220865020.

The spelling of 399211904 in words is "three hundred ninety-nine million, two hundred eleven thousand, nine hundred four".