399931118 has 8 divisors (see below), whose sum is σ = 605503512. Its totient is φ = 198096616.

The previous prime is 399931111. The next prime is 399931121. The reversal of 399931118 is 811139993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399931111) 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, 934205 + ... + 934632.

It is an arithmetic number, because the mean of its divisors is an integer number (75687939).

Almost surely, 2^399931118 is an apocalyptic number.

399931118 is a deficient number, since it is larger than the sum of its proper divisors (205572394).

399931118 is a wasteful number, since it uses less digits than its factorization.

399931118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868946.

The product of its digits is 52488, while the sum is 44.

The square root of 399931118 is about 19998.2778758572. The cubic root of 399931118 is about 736.7640033905.

The spelling of 399931118 in words is "three hundred ninety-nine million, nine hundred thirty-one thousand, one hundred eighteen".