399120790 has 8 divisors (see below), whose sum is σ = 718417440. Its totient is φ = 159648312.

The previous prime is 399120779. The next prime is 399120803. The reversal of 399120790 is 97021993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19956030 + ... + 19956049.

It is an arithmetic number, because the mean of its divisors is an integer number (89802180).

Almost surely, 2^399120790 is an apocalyptic number.

399120790 is a deficient number, since it is larger than the sum of its proper divisors (319296650).

399120790 is a wasteful number, since it uses less digits than its factorization.

399120790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39912086.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 399120790 is about 19978.0076584228. The cubic root of 399120790 is about 736.2660641618.

The spelling of 399120790 in words is "three hundred ninety-nine million, one hundred twenty thousand, seven hundred ninety".