399792 has 20 divisors (see below), whose sum is σ = 1032920. Its totient is φ = 133248.

The previous prime is 399787. The next prime is 399793. The reversal of 399792 is 297993.

It is a self number, because there is not a number n which added to its sum of digits gives 399792.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399792.

It is not an unprimeable number, because it can be changed into a prime (399793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4117 + ... + 4212.

It is an arithmetic number, because the mean of its divisors is an integer number (51646).

2³⁹⁹⁷⁹² is an apocalyptic number.

It is an amenable number.

399792 is an abundant number, since it is smaller than the sum of its proper divisors (633128).

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

399792 is a wasteful number, since it uses less digits than its factorization.

399792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8340 (or 8334 counting only the distinct ones).

The product of its digits is 30618, while the sum is 39.

The square root of 399792 is about 632.2910722128. The cubic root of 399792 is about 73.6678564493.

The spelling of 399792 in words is "three hundred ninety-nine thousand, seven hundred ninety-two".