990608 has 20 divisors (see below), whose sum is σ = 1941468. Its totient is φ = 489600.

The previous prime is 990599. The next prime is 990631. The reversal of 990608 is 806099.

It is a happy number.

990608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 425104 + 565504 = 652^2 + 752^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990608.

It is an unprimeable number.

990608 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, 1310 + ... + 1922.

2⁹⁹⁰⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

990608 is a deficient number, since it is larger than the sum of its proper divisors (950860).

990608 is a wasteful number, since it uses less digits than its factorization.

990608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 990608 is about 995.2929217070. The cubic root of 990608 is about 99.6859480797.

The spelling of 990608 in words is "nine hundred ninety thousand, six hundred eight".