399030916 has 12 divisors (see below), whose sum is σ = 700378588. Its totient is φ = 198922752.

The previous prime is 399030899. The next prime is 399030949. The reversal of 399030916 is 619030993.

It can be written as a sum of positive squares in 2 ways, for example, as 297424516 + 101606400 = 17246^2 + 10080^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 146661 + ... + 149356.

Almost surely, 2^399030916 is an apocalyptic number.

It is an amenable number.

399030916 is a deficient number, since it is larger than the sum of its proper divisors (301347672).

399030916 is a wasteful number, since it uses less digits than its factorization.

399030916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296358 (or 296356 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 399030916 is about 19975.7582083885. The cubic root of 399030916 is about 736.2107958943.

The spelling of 399030916 in words is "three hundred ninety-nine million, thirty thousand, nine hundred sixteen".