399267504 has 60 divisors (see below), whose sum is σ = 1127880936. Its totient is φ = 131840256.

The previous prime is 399267499. The next prime is 399267521. The reversal of 399267504 is 405762993.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 399267504.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2452 + ... + 28364.

Almost surely, 2^399267504 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 399267504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563940468).

399267504 is an abundant number, since it is smaller than the sum of its proper divisors (728613432).

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

399267504 is a wasteful number, since it uses less digits than its factorization.

399267504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26034 (or 26025 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 399267504 is about 19981.6792087152. The cubic root of 399267504 is about 736.3562685217.

The spelling of 399267504 in words is "three hundred ninety-nine million, two hundred sixty-seven thousand, five hundred four".