990508 has 12 divisors (see below), whose sum is σ = 1824760. Its totient is φ = 469152.

The previous prime is 990503. The next prime is 990511. The reversal of 990508 is 805099.

It is a super-2 number, since 2×990508² = 1962212196128, which contains 22 as substring.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 990508.

It is not an unprimeable number, because it can be changed into a prime (990503) 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, 6441 + ... + 6592.

2⁹⁹⁰⁵⁰⁸ is an apocalyptic number.

It is an amenable number.

990508 is a deficient number, since it is larger than the sum of its proper divisors (834252).

990508 is a wasteful number, since it uses less digits than its factorization.

990508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13056 (or 13054 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 990508 is about 995.2426839721. The cubic root of 990508 is about 99.6825935977.

The spelling of 990508 in words is "nine hundred ninety thousand, five hundred eight".