399859616 has 24 divisors (see below), whose sum is σ = 847780164. Its totient is φ = 184550400.

The previous prime is 399859561. The next prime is 399859619. The reversal of 399859616 is 616958993.

It can be written as a sum of positive squares in 2 ways, for example, as 399840016 + 19600 = 19996^2 + 140^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (399859619) by changing a digit.

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, 480185 + ... + 481016.

Almost surely, 2^399859616 is an apocalyptic number.

It is an amenable number.

399859616 is an abundant number, since it is smaller than the sum of its proper divisors (447920548).

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

399859616 is a wasteful number, since it uses less digits than its factorization.

399859616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961224 (or 961216 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 56.

The square root of 399859616 is about 19996.4900920136. The cubic root of 399859616 is about 736.7200931293.

The spelling of 399859616 in words is "three hundred ninety-nine million, eight hundred fifty-nine thousand, six hundred sixteen".