990970320 has 80 divisors (see below), whose sum is σ = 3094534080. Its totient is φ = 262321152.

The previous prime is 990970319. The next prime is 990970363. The reversal of 990970320 is 23079099.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17811 + ... + 47949.

It is an arithmetic number, because the mean of its divisors is an integer number (38681676).

Almost surely, 2^990970320 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 990970320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1547267040).

990970320 is an abundant number, since it is smaller than the sum of its proper divisors (2103563760).

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

990970320 is a wasteful number, since it uses less digits than its factorization.

990970320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30292 (or 30286 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 990970320 is about 31479.6810657287. The cubic root of 990970320 is about 996.9810014867.

The spelling of 990970320 in words is "nine hundred ninety million, nine hundred seventy thousand, three hundred twenty".