390797992 has 16 divisors (see below), whose sum is σ = 789111540. Its totient is φ = 180368256.

The previous prime is 390797983. The next prime is 390798007. The reversal of 390797992 is 299797093.

It can be written as a sum of positive squares in 2 ways, for example, as 285407236 + 105390756 = 16894^2 + 10266^2 .

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, 1878733 + ... + 1878940.

Almost surely, 2^390797992 is an apocalyptic number.

It is an amenable number.

390797992 is an abundant number, since it is smaller than the sum of its proper divisors (398313548).

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

390797992 is a wasteful number, since it uses less digits than its factorization.

390797992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3757692 (or 3757688 counting only the distinct ones).

The product of its (nonzero) digits is 1928934, while the sum is 55.

The square root of 390797992 is about 19768.6112815241. The cubic root of 390797992 is about 731.1123293850.

The spelling of 390797992 in words is "three hundred ninety million, seven hundred ninety-seven thousand, nine hundred ninety-two".