990591320 has 16 divisors (see below), whose sum is σ = 2228830560. Its totient is φ = 396236512.

The previous prime is 990591319. The next prime is 990591323. The reversal of 990591320 is 23195099.

990591320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990591323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12382352 + ... + 12382431.

It is an arithmetic number, because the mean of its divisors is an integer number (139301910).

Almost surely, 2^990591320 is an apocalyptic number.

It is an amenable number.

990591320 is an abundant number, since it is smaller than the sum of its proper divisors (1238239240).

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

990591320 is a wasteful number, since it uses less digits than its factorization.

990591320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24764794 (or 24764790 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 990591320 is about 31473.6607340169. The cubic root of 990591320 is about 996.8538856781.

The spelling of 990591320 in words is "nine hundred ninety million, five hundred ninety-one thousand, three hundred twenty".