399157190 has 32 divisors (see below), whose sum is σ = 735105024. Its totient is φ = 156008160.

The previous prime is 399157141. The next prime is 399157219. The reversal of 399157190 is 91751993.

It is a super-2 number, since 2×399157190² = 318652924657392200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 82745 + ... + 87435.

It is an arithmetic number, because the mean of its divisors is an integer number (22972032).

Almost surely, 2^399157190 is an apocalyptic number.

399157190 is a deficient number, since it is larger than the sum of its proper divisors (335947834).

399157190 is a wasteful number, since it uses less digits than its factorization.

399157190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 399157190 is about 19978.9186394059. The cubic root of 399157190 is about 736.2884460828.

The spelling of 399157190 in words is "three hundred ninety-nine million, one hundred fifty-seven thousand, one hundred ninety".