399157936 has 30 divisors (see below), whose sum is σ = 781022060. Its totient is φ = 197623008.

The previous prime is 399157933. The next prime is 399157987. The reversal of 399157936 is 639751993.

It is not an unprimeable number, because it can be changed into a prime (399157933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 182095 + ... + 184273.

Almost surely, 2^399157936 is an apocalyptic number.

It is an amenable number.

399157936 is a deficient number, since it is larger than the sum of its proper divisors (381864124).

399157936 is a wasteful number, since it uses less digits than its factorization.

399157936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401 (or 2288 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 52.

The square root of 399157936 is about 19978.9373090763. The cubic root of 399157936 is about 736.2889047750.

The spelling of 399157936 in words is "three hundred ninety-nine million, one hundred fifty-seven thousand, nine hundred thirty-six".