399992000 has 56 divisors (see below), whose sum is σ = 990600000. Its totient is φ = 159993600.

The previous prime is 399991981. The next prime is 399992003. The reversal of 399992000 is 299993.

It is not an unprimeable number, because it can be changed into a prime (399992003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17000 + ... + 32999.

Almost surely, 2^399992000 is an apocalyptic number.

It is an amenable number.

399992000 is an abundant number, since it is smaller than the sum of its proper divisors (590608000).

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

399992000 is an equidigital number, since it uses as much as digits as its factorization.

399992000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50026 (or 50006 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 399992000 is about 19999.7999990000. The cubic root of 399992000 is about 736.8013876533.

The spelling of 399992000 in words is "three hundred ninety-nine million, nine hundred ninety-two thousand".