99808128 has 96 divisors (see below), whose sum is σ = 328264560. Its totient is φ = 28514304.

The previous prime is 99808123. The next prime is 99808141. The reversal of 99808128 is 82180899.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99808123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1876 + ... + 14252.

Almost surely, 2^99808128 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 99808128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164132280).

99808128 is an abundant number, since it is smaller than the sum of its proper divisors (228456432).

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

99808128 is a wasteful number, since it uses less digits than its factorization.

99808128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12404 (or 12389 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 99808128 is about 9990.4017937218. The cubic root of 99808128 is about 463.8618296483.

The spelling of 99808128 in words is "ninety-nine million, eight hundred eight thousand, one hundred twenty-eight".