990784968 has 64 divisors (see below), whose sum is σ = 2535287040. Its totient is φ = 322543104.

The previous prime is 990784937. The next prime is 990784979. The reversal of 990784968 is 869487099.

990784968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×990784968² = 1963309705629522048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294705 + ... + 298047.

It is an arithmetic number, because the mean of its divisors is an integer number (39613860).

Almost surely, 2^990784968 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 990784968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1267643520).

990784968 is an abundant number, since it is smaller than the sum of its proper divisors (1544502072).

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

990784968 is a wasteful number, since it uses less digits than its factorization.

990784968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638 (or 3634 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 60.

The square root of 990784968 is about 31476.7369338056. The cubic root of 990784968 is about 996.9188388631.

The spelling of 990784968 in words is "nine hundred ninety million, seven hundred eighty-four thousand, nine hundred sixty-eight".