399488716 has 24 divisors (see below), whose sum is σ = 767241216. Its totient is φ = 180495120.

The previous prime is 399488689. The next prime is 399488731. The reversal of 399488716 is 617884993.

It is a super-2 number, since 2×399488716² = 319182468422657312, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19836 + ... + 34531.

It is an arithmetic number, because the mean of its divisors is an integer number (31968384).

Almost surely, 2^399488716 is an apocalyptic number.

It is an amenable number.

399488716 is a deficient number, since it is larger than the sum of its proper divisors (367752500).

399488716 is a wasteful number, since it uses less digits than its factorization.

399488716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54549 (or 54547 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The square root of 399488716 is about 19987.2138128354. The cubic root of 399488716 is about 736.4922348163.

The spelling of 399488716 in words is "three hundred ninety-nine million, four hundred eighty-eight thousand, seven hundred sixteen".