399379568328 has 384 divisors, whose sum is σ = 1299111436800. Its totient is φ = 113188368384.

The previous prime is 399379568317. The next prime is 399379568387. The reversal of 399379568328 is 823865973993.

399379568328 is a `hidden beast` number, since 3 + 9 + 9 + 37 + 9 + 568 + 3 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29159850 + ... + 29173542.

It is an arithmetic number, because the mean of its divisors is an integer number (3383102700).

Almost surely, 2^399379568328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399379568328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649555718400).

399379568328 is an abundant number, since it is smaller than the sum of its proper divisors (899731868472).

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

399379568328 is a wasteful number, since it uses less digits than its factorization.

399379568328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13798 (or 13775 counting only the distinct ones).

The product of its digits is 529079040, while the sum is 72.

The spelling of 399379568328 in words is "three hundred ninety-nine billion, three hundred seventy-nine million, five hundred sixty-eight thousand, three hundred twenty-eight".