9887923998 has 24 divisors (see below), whose sum is σ = 21946369536. Its totient is φ = 3215584800.

The previous prime is 9887923987. The next prime is 9887924029. The reversal of 9887923998 is 8993297889.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6698398 + ... + 6699873.

It is an arithmetic number, because the mean of its divisors is an integer number (914432064).

Almost surely, 2^9887923998 is an apocalyptic number.

9887923998 is an abundant number, since it is smaller than the sum of its proper divisors (12058445538).

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

9887923998 is a wasteful number, since it uses less digits than its factorization.

9887923998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13398320 (or 13398317 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 72.

The square root of 9887923998 is about 99438.0410004139. The cubic root of 9887923998 is about 2146.3557517129.

The spelling of 9887923998 in words is "nine billion, eight hundred eighty-seven million, nine hundred twenty-three thousand, nine hundred ninety-eight".