9990305280 has 120 divisors (see below), whose sum is σ = 34599316752. Its totient is φ = 2664075264.

The previous prime is 9990305257. The next prime is 9990305327. The reversal of 9990305280 is 825030999.

9990305280 is a `hidden beast` number, since 9 + 9 + 90 + 30 + 528 + 0 = 666.

9990305280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193764 + ... + 239843.

Almost surely, 2^9990305280 is an apocalyptic number.

9990305280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9990305280 is an abundant number, since it is smaller than the sum of its proper divisors (24609011472).

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

9990305280 is a wasteful number, since it uses less digits than its factorization.

9990305280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433636 (or 433617 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 9990305280 is about 99951.5146458522. The cubic root of 9990305280 is about 2153.7382435523.

The spelling of 9990305280 in words is "nine billion, nine hundred ninety million, three hundred five thousand, two hundred eighty".