399704028344 has 16 divisors (see below), whose sum is σ = 749466776520. Its totient is φ = 199846221280.

The previous prime is 399704028319. The next prime is 399704028371. The reversal of 399704028344 is 443820407993.

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, 423527 + ... + 989334.

Almost surely, 2^399704028344 is an apocalyptic number.

It is an amenable number.

399704028344 is a deficient number, since it is larger than the sum of its proper divisors (349762748176).

399704028344 is a wasteful number, since it uses less digits than its factorization.

399704028344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448230 (or 1448226 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 399704028344 in words is "three hundred ninety-nine billion, seven hundred four million, twenty-eight thousand, three hundred forty-four".