399964912 has 20 divisors (see below), whose sum is σ = 775296360. Its totient is φ = 199888448.

The previous prime is 399964909. The next prime is 399964921. The reversal of 399964912 is 219469993.

It is a self number, because there is not a number n which added to its sum of digits gives 399964912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40143 + ... + 49105.

It is an arithmetic number, because the mean of its divisors is an integer number (38764818).

Almost surely, 2^399964912 is an apocalyptic number.

It is an amenable number.

399964912 is a deficient number, since it is larger than the sum of its proper divisors (375331448).

399964912 is a wasteful number, since it uses less digits than its factorization.

399964912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11760 (or 11754 counting only the distinct ones).

The product of its digits is 944784, while the sum is 52.

The square root of 399964912 is about 19999.1227807622. The cubic root of 399964912 is about 736.7847548819.

The spelling of 399964912 in words is "three hundred ninety-nine million, nine hundred sixty-four thousand, nine hundred twelve".