9988320 has 48 divisors (see below), whose sum is σ = 31464720. Its totient is φ = 2663424.

The previous prime is 9988313. The next prime is 9988331. The reversal of 9988320 is 238899.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9925 + ... + 10884.

It is an arithmetic number, because the mean of its divisors is an integer number (655515).

Almost surely, 2^9988320 is an apocalyptic number.

It is an amenable number.

9988320 is an abundant number, since it is smaller than the sum of its proper divisors (21476400).

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

9988320 is a wasteful number, since it uses less digits than its factorization.

9988320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20827 (or 20819 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 9988320 is about 3160.4303504428. The cubic root of 9988320 is about 215.3595570010.

The spelling of 9988320 in words is "nine million, nine hundred eighty-eight thousand, three hundred twenty".