399662708264 has 32 divisors (see below), whose sum is σ = 753787960200. Its totient is φ = 198654247680.

The previous prime is 399662708261. The next prime is 399662708267. The reversal of 399662708264 is 462807266993.

It is an interprime number because it is at equal distance from previous prime (399662708261) and next prime (399662708267).

It can be written as a sum of positive squares in 4 ways, for example, as 263228511364 + 136434196900 = 513058^2 + 369370^2 .

It is a junction number, because it is equal to n+sod(n) for n = 399662708197 and 399662708206.

It is not an unprimeable number, because it can be changed into a prime (399662708261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1833734 + ... + 2040074.

Almost surely, 2^399662708264 is an apocalyptic number.

It is an amenable number.

399662708264 is a deficient number, since it is larger than the sum of its proper divisors (354125251936).

399662708264 is a wasteful number, since it uses less digits than its factorization.

399662708264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207773 (or 207769 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 62.

The spelling of 399662708264 in words is "three hundred ninety-nine billion, six hundred sixty-two million, seven hundred eight thousand, two hundred sixty-four".