399216896320 has 112 divisors (see below), whose sum is σ = 1037427326208. Its totient is φ = 145117890560.

The previous prime is 399216896269. The next prime is 399216896333. The reversal of 399216896320 is 23698612993.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 10622202 + ... + 10659718.

It is an arithmetic number, because the mean of its divisors is an integer number (9262743984).

Almost surely, 2^399216896320 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 399216896320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518713663104).

399216896320 is an abundant number, since it is smaller than the sum of its proper divisors (638210429888).

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

399216896320 is a wasteful number, since it uses less digits than its factorization.

399216896320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40568 (or 40558 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 58.

The spelling of 399216896320 in words is "three hundred ninety-nine billion, two hundred sixteen million, eight hundred ninety-six thousand, three hundred twenty".