399279928 has 16 divisors (see below), whose sum is σ = 751437000. Its totient is φ = 198896736.

The previous prime is 399279871. The next prime is 399279929. The reversal of 399279928 is 829972993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399279929) 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, 90618 + ... + 94921.

Almost surely, 2^399279928 is an apocalyptic number.

It is an amenable number.

399279928 is a deficient number, since it is larger than the sum of its proper divisors (352157072).

399279928 is a wasteful number, since it uses less digits than its factorization.

399279928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185814 (or 185810 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 58.

The square root of 399279928 is about 19981.9900910795. The cubic root of 399279928 is about 736.3639061709.

The spelling of 399279928 in words is "three hundred ninety-nine million, two hundred seventy-nine thousand, nine hundred twenty-eight".