399680912 has 20 divisors (see below), whose sum is σ = 777146316. Its totient is φ = 199127040.

The previous prime is 399680909. The next prime is 399680947. The reversal of 399680912 is 219086993.

It can be written as a sum of positive squares in 2 ways, for example, as 160174336 + 239506576 = 12656^2 + 15476^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39953 + ... + 48944.

Almost surely, 2^399680912 is an apocalyptic number.

It is an amenable number.

399680912 is a deficient number, since it is larger than the sum of its proper divisors (377465404).

399680912 is a wasteful number, since it uses less digits than its factorization.

399680912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89186 (or 89180 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 399680912 is about 19992.0212084721. The cubic root of 399680912 is about 736.6103259009.

The spelling of 399680912 in words is "three hundred ninety-nine million, six hundred eighty thousand, nine hundred twelve".