9988380 has 96 divisors (see below), whose sum is σ = 31752000. Its totient is φ = 2605824.

The previous prime is 9988373. The next prime is 9988397. The reversal of 9988380 is 838899.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28446 + ... + 28794.

It is an arithmetic number, because the mean of its divisors is an integer number (330750).

Almost surely, 2^9988380 is an apocalyptic number.

9988380 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9988380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15876000).

9988380 is an abundant number, since it is smaller than the sum of its proper divisors (21763620).

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

9988380 is a wasteful number, since it uses less digits than its factorization.

9988380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 9988380 is about 3160.4398428067. The cubic root of 9988380 is about 215.3599882230.

The spelling of 9988380 in words is "nine million, nine hundred eighty-eight thousand, three hundred eighty".