9909992088 has 64 divisors (see below), whose sum is σ = 28271772000. Its totient is φ = 3214048896.

The previous prime is 9909992077. The next prime is 9909992093. The reversal of 9909992088 is 8802999099.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 612003 + ... + 627986.

Almost surely, 2^9909992088 is an apocalyptic number.

It is an amenable number.

9909992088 is an abundant number, since it is smaller than the sum of its proper divisors (18361779912).

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

9909992088 is a wasteful number, since it uses less digits than its factorization.

9909992088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240041 (or 1240031 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 63.

The square root of 9909992088 is about 99548.9431787199. The cubic root of 9909992088 is about 2147.9513268831.

The spelling of 9909992088 in words is "nine billion, nine hundred nine million, nine hundred ninety-two thousand, eighty-eight".