9988109992 has 16 divisors (see below), whose sum is σ = 21403092960. Its totient is φ = 4280618544.

The previous prime is 9988109987. The next prime is 9988109993. The reversal of 9988109992 is 2999018899.

9988109992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9988109993) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 89179498 + ... + 89179609.

It is an arithmetic number, because the mean of its divisors is an integer number (1337693310).

Almost surely, 2^9988109992 is an apocalyptic number.

It is an amenable number.

9988109992 is an abundant number, since it is smaller than the sum of its proper divisors (11414982968).

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

9988109992 is a wasteful number, since it uses less digits than its factorization.

9988109992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178359120 (or 178359116 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 64.

The square root of 9988109992 is about 99940.5322779502. The cubic root of 9988109992 is about 2153.5804765322.

The spelling of 9988109992 in words is "nine billion, nine hundred eighty-eight million, one hundred nine thousand, nine hundred ninety-two".