9900028908 has 72 divisors (see below), whose sum is σ = 31200099840. Its totient is φ = 2571435360.

The previous prime is 9900028891. The next prime is 9900028927. The reversal of 9900028908 is 8098200099.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1782948 + ... + 1788491.

It is an arithmetic number, because the mean of its divisors is an integer number (433334720).

Almost surely, 2^9900028908 is an apocalyptic number.

It is an amenable number.

9900028908 is an abundant number, since it is smaller than the sum of its proper divisors (21300070932).

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

9900028908 is a wasteful number, since it uses less digits than its factorization.

9900028908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571467 (or 3571462 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 9900028908 is about 99498.8889787218. Note that the first 3 decimals coincide. The cubic root of 9900028908 is about 2147.2312589866.

The spelling of 9900028908 in words is "nine billion, nine hundred million, twenty-eight thousand, nine hundred eight".