9999888750 has 320 divisors, whose sum is σ = 30466497600. Its totient is φ = 2419200000.

The previous prime is 9999888719. The next prime is 9999888751. The reversal of 9999888750 is 578889999.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999888751) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 16638450 + ... + 16639050.

It is an arithmetic number, because the mean of its divisors is an integer number (95207805).

Almost surely, 2^9999888750 is an apocalyptic number.

9999888750 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999888750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15233248800).

9999888750 is an abundant number, since it is smaller than the sum of its proper divisors (20466608850).

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

9999888750 is a wasteful number, since it uses less digits than its factorization.

9999888750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 72.

The square root of 9999888750 is about 99999.4437484529. The cubic root of 9999888750 is about 2154.4267006403.

The spelling of 9999888750 in words is "nine billion, nine hundred ninety-nine million, eight hundred eighty-eight thousand, seven hundred fifty".