990996 has 24 divisors (see below), whose sum is σ = 2328480. Its totient is φ = 328032.

The previous prime is 990989. The next prime is 991009. The reversal of 990996 is 699099.

It is an Ulam number.

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 990996.

It is an unprimeable number.

990996 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 3075 + ... + 3381.

It is an arithmetic number, because the mean of its divisors is an integer number (97020).

2⁹⁹⁰⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

990996 is an abundant number, since it is smaller than the sum of its proper divisors (1337484).

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

990996 is a wasteful number, since it uses less digits than its factorization.

990996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 990996 is about 995.4878201163. The cubic root of 990996 is about 99.6989613333.

The spelling of 990996 in words is "nine hundred ninety thousand, nine hundred ninety-six".