990392 has 32 divisors (see below), whose sum is σ = 2041200. Its totient is φ = 447744.

The previous prime is 990389. The next prime is 990397. The reversal of 990392 is 293099.

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 990392.

It is not an unprimeable number, because it can be changed into a prime (990397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9203 + ... + 9309.

2⁹⁹⁰³⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1020600).

990392 is an abundant number, since it is smaller than the sum of its proper divisors (1050808).

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

990392 is a wasteful number, since it uses less digits than its factorization.

990392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 211 counting only the distinct ones).

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

The square root of 990392 is about 995.1844050225. The cubic root of 990392 is about 99.6787021156.

The spelling of 990392 in words is "nine hundred ninety thousand, three hundred ninety-two".