990936 has 24 divisors (see below), whose sum is σ = 2683980. Its totient is φ = 330288.

The previous prime is 990923. The next prime is 990953. The reversal of 990936 is 639099.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 990936.

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 990936.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6810 + ... + 6953.

2⁹⁹⁰⁹³⁶ is an apocalyptic number.

It is an amenable number.

990936 is an abundant number, since it is smaller than the sum of its proper divisors (1693044).

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

990936 is a wasteful number, since it uses less digits than its factorization.

990936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13775 (or 13768 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 36.

The square root of 990936 is about 995.4576836812. The cubic root of 990936 is about 99.6969491965.

It can be divided in two parts, 99093 and 6, that added together give a palindrome (99099).

The spelling of 990936 in words is "nine hundred ninety thousand, nine hundred thirty-six".