399696756 has 24 divisors (see below), whose sum is σ = 932949024. Its totient is φ = 133186080.

The previous prime is 399696743. The next prime is 399696761. The reversal of 399696756 is 657696993.

It is a self number, because there is not a number n which added to its sum of digits gives 399696756.

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 7 ways as a sum of consecutive naturals, for example, 65266 + ... + 71126.

It is an arithmetic number, because the mean of its divisors is an integer number (38872876).

Almost surely, 2^399696756 is an apocalyptic number.

It is an amenable number.

399696756 is an abundant number, since it is smaller than the sum of its proper divisors (533252268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399696756 is a wasteful number, since it uses less digits than its factorization.

399696756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11551 (or 11549 counting only the distinct ones).

The product of its digits is 16533720, while the sum is 60.

The square root of 399696756 is about 19992.4174626282. The cubic root of 399696756 is about 736.6200592486.

The spelling of 399696756 in words is "three hundred ninety-nine million, six hundred ninety-six thousand, seven hundred fifty-six".