990508630 has 64 divisors (see below), whose sum is σ = 1883269440. Its totient is φ = 374585344.

The previous prime is 990508567. The next prime is 990508633. The reversal of 990508630 is 36805099.

It is a super-2 number, since 2×990508630² = 1962214692208953800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990508633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4250994 + ... + 4251226.

It is an arithmetic number, because the mean of its divisors is an integer number (29426085).

Almost surely, 2^990508630 is an apocalyptic number.

990508630 is a deficient number, since it is larger than the sum of its proper divisors (892760810).

990508630 is a wasteful number, since it uses less digits than its factorization.

990508630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 990508630 is about 31472.3470684981. The cubic root of 990508630 is about 996.8261473162.

The spelling of 990508630 in words is "nine hundred ninety million, five hundred eight thousand, six hundred thirty".