9885985900 has 72 divisors (see below), whose sum is σ = 24610924800. Its totient is φ = 3376530240.

The previous prime is 9885985883. The next prime is 9885985919. The reversal of 9885985900 is 95895889.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157251 + ... + 210949.

It is an arithmetic number, because the mean of its divisors is an integer number (341818400).

Almost surely, 2^9885985900 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 9885985900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12305462400).

9885985900 is an abundant number, since it is smaller than the sum of its proper divisors (14724938900).

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

9885985900 is a wasteful number, since it uses less digits than its factorization.

9885985900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53983 (or 53976 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 61.

The square root of 9885985900 is about 99428.2952684999. The cubic root of 9885985900 is about 2146.2155092783.

The spelling of 9885985900 in words is "nine billion, eight hundred eighty-five million, nine hundred eighty-five thousand, nine hundred".