99307799928 has 128 divisors (see below), whose sum is σ = 290741472000. Its totient is φ = 31320639360.

The previous prime is 99307799863. The next prime is 99307799939. The reversal of 99307799928 is 82999770399.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3313426 + ... + 3343262.

It is an arithmetic number, because the mean of its divisors is an integer number (2271417750).

Almost surely, 2^99307799928 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 99307799928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145370736000).

99307799928 is an abundant number, since it is smaller than the sum of its proper divisors (191433672072).

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

99307799928 is a wasteful number, since it uses less digits than its factorization.

99307799928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30682 (or 30672 counting only the distinct ones).

The product of its (nonzero) digits is 138883248, while the sum is 72.

The spelling of 99307799928 in words is "ninety-nine billion, three hundred seven million, seven hundred ninety-nine thousand, nine hundred twenty-eight".