99128928 has 48 divisors (see below), whose sum is σ = 273913920. Its totient is φ = 31303296.

The previous prime is 99128927. The next prime is 99128929. The reversal of 99128928 is 82982199.

It is an interprime number because it is at equal distance from previous prime (99128927) and next prime (99128929).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99128923) 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, 25350 + ... + 28997.

It is an arithmetic number, because the mean of its divisors is an integer number (5706540).

Almost surely, 2^99128928 is an apocalyptic number.

It is an amenable number.

99128928 is an abundant number, since it is smaller than the sum of its proper divisors (174784992).

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

99128928 is a wasteful number, since it uses less digits than its factorization.

99128928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54379 (or 54371 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 99128928 is about 9956.3511388460. The cubic root of 99128928 is about 462.8072317553.

The spelling of 99128928 in words is "ninety-nine million, one hundred twenty-eight thousand, nine hundred twenty-eight".