399799118 has 16 divisors (see below), whose sum is σ = 615051360. Its totient is φ = 194793600.

The previous prime is 399799093. The next prime is 399799139. The reversal of 399799118 is 811997993.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82178 + ... + 86906.

It is an arithmetic number, because the mean of its divisors is an integer number (38440710).

Almost surely, 2^399799118 is an apocalyptic number.

399799118 is a deficient number, since it is larger than the sum of its proper divisors (215252242).

399799118 is a wasteful number, since it uses less digits than its factorization.

399799118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5803.

The product of its digits is 1102248, while the sum is 56.

The square root of 399799118 is about 19994.9773193170. The cubic root of 399799118 is about 736.6829364720.

The spelling of 399799118 in words is "three hundred ninety-nine million, seven hundred ninety-nine thousand, one hundred eighteen".