9988900 has 72 divisors (see below), whose sum is σ = 23373504. Its totient is φ = 3696000.

The previous prime is 9988879. The next prime is 9988907. The reversal of 9988900 is 98899.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98850 + ... + 98950.

It is an arithmetic number, because the mean of its divisors is an integer number (324632).

Almost surely, 2^9988900 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 9988900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11686752).

9988900 is an abundant number, since it is smaller than the sum of its proper divisors (13384604).

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

9988900 is a wasteful number, since it uses less digits than its factorization.

9988900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 9988900 is about 3160.5221087662. The cubic root of 9988900 is about 215.3637254072.

The spelling of 9988900 in words is "nine million, nine hundred eighty-eight thousand, nine hundred".