399249516 has 24 divisors (see below), whose sum is σ = 945488320. Its totient is φ = 131096592.

The previous prime is 399249497. The next prime is 399249547. The reversal of 399249516 is 615942993.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247486 + ... + 249093.

Almost surely, 2^399249516 is an apocalyptic number.

It is an amenable number.

399249516 is an abundant number, since it is smaller than the sum of its proper divisors (546238804).

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

399249516 is a wasteful number, since it uses less digits than its factorization.

399249516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496653 (or 496651 counting only the distinct ones).

The product of its digits is 524880, while the sum is 48.

The square root of 399249516 is about 19981.2290913247. The cubic root of 399249516 is about 736.3452101249.

The spelling of 399249516 in words is "three hundred ninety-nine million, two hundred forty-nine thousand, five hundred sixteen".