399919344 has 160 divisors (see below), whose sum is σ = 1187923968. Its totient is φ = 114816000.

The previous prime is 399919327. The next prime is 399919363. The reversal of 399919344 is 443919993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 867274 + ... + 867734.

Almost surely, 2^399919344 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 399919344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (593961984).

399919344 is an abundant number, since it is smaller than the sum of its proper divisors (788004624).

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

399919344 is a wasteful number, since it uses less digits than its factorization.

399919344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 561 counting only the distinct ones).

The product of its digits is 944784, while the sum is 51.

The square root of 399919344 is about 19997.9834983430. The cubic root of 399919344 is about 736.7567731917.

The spelling of 399919344 in words is "three hundred ninety-nine million, nine hundred nineteen thousand, three hundred forty-four".