99881100 has 360 divisors, whose sum is σ = 378100800. Its totient is φ = 22550400.

The previous prime is 99881099. The next prime is 99881123. The reversal of 99881100 is 118899.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1692871 + ... + 1692929.

It is an arithmetic number, because the mean of its divisors is an integer number (1050280).

Almost surely, 2^99881100 is an apocalyptic number.

99881100 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 99881100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189050400).

99881100 is an abundant number, since it is smaller than the sum of its proper divisors (278219700).

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

99881100 is a wasteful number, since it uses less digits than its factorization.

99881100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 99881100 is about 9994.0532317974. The cubic root of 99881100 is about 463.9748487655.

Adding to 99881100 its reverse (118899), we get a palindrome (99999999).

The spelling of 99881100 in words is "ninety-nine million, eight hundred eighty-one thousand, one hundred".