399790136 has 64 divisors (see below), whose sum is σ = 798336000. Its totient is φ = 187418880.

The previous prime is 399790133. The next prime is 399790141. The reversal of 399790136 is 631097993.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399790133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302095 + ... + 1302401.

It is an arithmetic number, because the mean of its divisors is an integer number (12474000).

Almost surely, 2^399790136 is an apocalyptic number.

It is an amenable number.

399790136 is a deficient number, since it is larger than the sum of its proper divisors (398545864).

399790136 is a wasteful number, since it uses less digits than its factorization.

399790136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 275562, while the sum is 47.

The square root of 399790136 is about 19994.7527116491. The cubic root of 399790136 is about 736.6774195883.

The spelling of 399790136 in words is "three hundred ninety-nine million, seven hundred ninety thousand, one hundred thirty-six".