990656 has 28 divisors (see below), whose sum is σ = 2054352. Its totient is φ = 473088.

The previous prime is 990643. The next prime is 990673. The reversal of 990656 is 656099.

990656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

990656 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 3 ways as a sum of consecutive naturals, for example, 1136 + ... + 1808.

2⁹⁹⁰⁶⁵⁶ 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 990656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027176).

990656 is an abundant number, since it is smaller than the sum of its proper divisors (1063696).

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

990656 is a wasteful number, since it uses less digits than its factorization.

990656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 990656 is about 995.3170349190. The cubic root of 990656 is about 99.6875581509.

The spelling of 990656 in words is "nine hundred ninety thousand, six hundred fifty-six".