392990 has 16 divisors (see below), whose sum is σ = 762048. Its totient is φ = 145056.

The previous prime is 392983. The next prime is 393007. The reversal of 392990 is 99293.

It is a super-2 number, since 2×392990² = 308882280200, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 392990.

It is an unprimeable number.

392990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1382 + ... + 1641.

It is an arithmetic number, because the mean of its divisors is an integer number (47628).

2³⁹²⁹⁹⁰ is an apocalyptic number.

392990 is a deficient number, since it is larger than the sum of its proper divisors (369058).

392990 is a wasteful number, since it uses less digits than its factorization.

392990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 392990 is about 626.8891449052. The cubic root of 392990 is about 73.2476731663.

The spelling of 392990 in words is "three hundred ninety-two thousand, nine hundred ninety".