399364564 has 12 divisors (see below), whose sum is σ = 715141504. Its totient is φ = 195038424.

The previous prime is 399364549. The next prime is 399364579. The reversal of 399364564 is 465463993.

It is an interprime number because it is at equal distance from previous prime (399364549) and next prime (399364579).

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 3 ways as a sum of consecutive naturals, for example, 1160772 + ... + 1161115.

Almost surely, 2^399364564 is an apocalyptic number.

It is an amenable number.

399364564 is a deficient number, since it is larger than the sum of its proper divisors (315776940).

399364564 is a wasteful number, since it uses less digits than its factorization.

399364564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321934 (or 2321932 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 49.

The square root of 399364564 is about 19984.1077859383. The cubic root of 399364564 is about 736.4159319037.

The spelling of 399364564 in words is "three hundred ninety-nine million, three hundred sixty-four thousand, five hundred sixty-four".