990308120912 has 60 divisors (see below), whose sum is σ = 2209115455776. Its totient is φ = 426448445760.

The previous prime is 990308120903. The next prime is 990308120947. The reversal of 990308120912 is 219021803099.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7729748 + ... + 7856819.

Almost surely, 2^990308120912 is an apocalyptic number.

It is an amenable number.

990308120912 is an abundant number, since it is smaller than the sum of its proper divisors (1218807334864).

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

990308120912 is a wasteful number, since it uses less digits than its factorization.

990308120912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15586624 (or 15586599 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 990308120912 in words is "nine hundred ninety billion, three hundred eight million, one hundred twenty thousand, nine hundred twelve".