399063168 has 384 divisors, whose sum is σ = 1443536640. Its totient is φ = 103219200.

The previous prime is 399063163. The next prime is 399063169. The reversal of 399063168 is 861360993.

399063168 is a `hidden beast` number, since 3 + 9 + 9 + 0 + 631 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is not an unprimeable number, because it can be changed into a prime (399063163) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5620573 + ... + 5620643.

It is an arithmetic number, because the mean of its divisors is an integer number (3759210).

Almost surely, 2^399063168 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 399063168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (721768320).

399063168 is an abundant number, since it is smaller than the sum of its proper divisors (1044473472).

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

399063168 is a wasteful number, since it uses less digits than its factorization.

399063168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 399063168 is about 19976.5654705708. The cubic root of 399063168 is about 736.2306303065.

The spelling of 399063168 in words is "three hundred ninety-nine million, sixty-three thousand, one hundred sixty-eight".