99651228 has 24 divisors (see below), whose sum is σ = 233143680. Its totient is φ = 33127920.

The previous prime is 99651217. The next prime is 99651241. The reversal of 99651228 is 82215699.

It is a self number, because there is not a number n which added to its sum of digits gives 99651228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6408 + ... + 15503.

It is an arithmetic number, because the mean of its divisors is an integer number (9714320).

Almost surely, 2^99651228 is an apocalyptic number.

It is an amenable number.

99651228 is an abundant number, since it is smaller than the sum of its proper divisors (133492452).

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

99651228 is a wasteful number, since it uses less digits than its factorization.

99651228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22297 (or 22295 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 99651228 is about 9982.5461681878. The cubic root of 99651228 is about 463.6186360563.

The spelling of 99651228 in words is "ninety-nine million, six hundred fifty-one thousand, two hundred twenty-eight".