990808 has 32 divisors (see below), whose sum is σ = 2288160. Its totient is φ = 391680.

The previous prime is 990799. The next prime is 990809. The reversal of 990808 is 808099.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990809) 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 7 ways as a sum of consecutive naturals, for example, 48 + ... + 1408.

It is an arithmetic number, because the mean of its divisors is an integer number (71505).

2⁹⁹⁰⁸⁰⁸ 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 990808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144080).

990808 is an abundant number, since it is smaller than the sum of its proper divisors (1297352).

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

990808 is a wasteful number, since it uses less digits than its factorization.

990808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387 (or 1383 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 990808 is about 995.3933895702. The cubic root of 990808 is about 99.6926563666.

The spelling of 990808 in words is "nine hundred ninety thousand, eight hundred eight".