9988305976 has 64 divisors (see below), whose sum is σ = 21161088000. Its totient is φ = 4378200960.

The previous prime is 9988305961. The next prime is 9988306037. The reversal of 9988305976 is 6795038899.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2649645 + ... + 2653411.

It is an arithmetic number, because the mean of its divisors is an integer number (330642000).

Almost surely, 2^9988305976 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 9988305976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10580544000).

9988305976 is an abundant number, since it is smaller than the sum of its proper divisors (11172782024).

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

9988305976 is a wasteful number, since it uses less digits than its factorization.

9988305976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852 (or 4848 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 64.

The square root of 9988305976 is about 99941.5127762233. The cubic root of 9988305976 is about 2153.5945620985.

The spelling of 9988305976 in words is "nine billion, nine hundred eighty-eight million, three hundred five thousand, nine hundred seventy-six".