990799992 has 384 divisors, whose sum is σ = 3638880000. Its totient is φ = 246903552.

The previous prime is 990799987. The next prime is 990800033. The reversal of 990799992 is 299997099.

990799992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2614059 + ... + 2614437.

It is an arithmetic number, because the mean of its divisors is an integer number (9476250).

Almost surely, 2^990799992 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 990799992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1819440000).

990799992 is an abundant number, since it is smaller than the sum of its proper divisors (2648080008).

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

990799992 is a wasteful number, since it uses less digits than its factorization.

990799992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 7440174, while the sum is 63.

The square root of 990799992 is about 31476.9755853386. The cubic root of 990799992 is about 996.9238778418.

The spelling of 990799992 in words is "nine hundred ninety million, seven hundred ninety-nine thousand, nine hundred ninety-two".