99189888 has 64 divisors (see below), whose sum is σ = 301120320. Its totient is φ = 28339200.

The previous prime is 99189887. The next prime is 99189907. The reversal of 99189888 is 88898199.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (99189887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15763 + ... + 21138.

It is an arithmetic number, because the mean of its divisors is an integer number (4705005).

Almost surely, 2^99189888 is an apocalyptic number.

It is an amenable number.

99189888 is an abundant number, since it is smaller than the sum of its proper divisors (201930432).

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

99189888 is a wasteful number, since it uses less digits than its factorization.

99189888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36925 (or 36913 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 60.

The square root of 99189888 is about 9959.4120308380. The cubic root of 99189888 is about 462.9020811203.

The spelling of 99189888 in words is "ninety-nine million, one hundred eighty-nine thousand, eight hundred eighty-eight".