990865956 has 24 divisors (see below), whose sum is σ = 2324941920. Its totient is φ = 328442752.

The previous prime is 990865933. The next prime is 990865963. The reversal of 990865956 is 659568099.

990865956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 990865896 and 990865905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228501 + ... + 232796.

It is an arithmetic number, because the mean of its divisors is an integer number (96872580).

Almost surely, 2^990865956 is an apocalyptic number.

It is an amenable number.

990865956 is an abundant number, since it is smaller than the sum of its proper divisors (1334075964).

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

990865956 is a wasteful number, since it uses less digits than its factorization.

990865956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461483 (or 461481 counting only the distinct ones).

The product of its (nonzero) digits is 5248800, while the sum is 57.

The square root of 990865956 is about 31478.0233814006. The cubic root of 990865956 is about 996.9460012531.

The spelling of 990865956 in words is "nine hundred ninety million, eight hundred sixty-five thousand, nine hundred fifty-six".