399630792 has 64 divisors (see below), whose sum is σ = 1092476160. Its totient is φ = 120814400.

The previous prime is 399630767. The next prime is 399630797. The reversal of 399630792 is 297036993.

It is not an unprimeable number, because it can be changed into a prime (399630797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128083 + ... + 131165.

It is an arithmetic number, because the mean of its divisors is an integer number (17069940).

Almost surely, 2^399630792 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 399630792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (546238080).

399630792 is an abundant number, since it is smaller than the sum of its proper divisors (692845368).

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

399630792 is a wasteful number, since it uses less digits than its factorization.

399630792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594 (or 3590 counting only the distinct ones).

The product of its (nonzero) digits is 551124, while the sum is 48.

The square root of 399630792 is about 19990.7676691017. The cubic root of 399630792 is about 736.5795342938.

The spelling of 399630792 in words is "three hundred ninety-nine million, six hundred thirty thousand, seven hundred ninety-two".