399855157 has 8 divisors (see below), whose sum is σ = 430811136. Its totient is φ = 368927472.

The previous prime is 399855139. The next prime is 399855163. The reversal of 399855157 is 751558993.

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

It is a cyclic number.

It is not a de Polignac number, because 399855157 - 2¹⁵ = 399822389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399855557) by changing a digit.

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, 29208 + ... + 40654.

It is an arithmetic number, because the mean of its divisors is an integer number (53851392).

Almost surely, 2^399855157 is an apocalyptic number.

It is an amenable number.

399855157 is a deficient number, since it is larger than the sum of its proper divisors (30955979).

399855157 is a wasteful number, since it uses less digits than its factorization.

399855157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14147.

The product of its digits is 1701000, while the sum is 52.

The square root of 399855157 is about 19996.3785971360. The cubic root of 399855157 is about 736.7173546289.

The spelling of 399855157 in words is "three hundred ninety-nine million, eight hundred fifty-five thousand, one hundred fifty-seven".