9988199100 has 648 divisors, whose sum is σ = 36979022080. Its totient is φ = 2335132800.

The previous prime is 9988199093. The next prime is 9988199107. The reversal of 9988199100 is 19918899.

It is an interprime number because it is at equal distance from previous prime (9988199093) and next prime (9988199107).

It is a super-2 number, since 2×9988199100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988199107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 126432861 + ... + 126432939.

Almost surely, 2^9988199100 is an apocalyptic number.

9988199100 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9988199100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18489511040).

9988199100 is an abundant number, since it is smaller than the sum of its proper divisors (26990822980).

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

9988199100 is a wasteful number, since it uses less digits than its factorization.

9988199100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The square root of 9988199100 is about 99940.9780820660. The cubic root of 9988199100 is about 2153.5868808362.

The spelling of 9988199100 in words is "nine billion, nine hundred eighty-eight million, one hundred ninety-nine thousand, one hundred".