990008 has 16 divisors (see below), whose sum is σ = 1896480. Its totient is φ = 484288.

The previous prime is 990001. The next prime is 990013. The reversal of 990008 is 800099.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990001) 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 3 ways as a sum of consecutive naturals, for example, 941 + ... + 1692.

It is an arithmetic number, because the mean of its divisors is an integer number (118530).

2⁹⁹⁰⁰⁰⁸ is an apocalyptic number.

It is an amenable number.

990008 is a deficient number, since it is larger than the sum of its proper divisors (906472).

990008 is a wasteful number, since it uses less digits than its factorization.

990008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686 (or 2682 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 990008 is about 994.9914572498. The cubic root of 990008 is about 99.6658177999.

The spelling of 990008 in words is "nine hundred ninety thousand, eight".