9929985792 has 72 divisors (see below), whose sum is σ = 26451191424. Its totient is φ = 3307121664.

The previous prime is 9929985773. The next prime is 9929985803. The reversal of 9929985792 is 2975899299.

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, 995743 + ... + 1005665.

Almost surely, 2^9929985792 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 9929985792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13225595712).

9929985792 is an abundant number, since it is smaller than the sum of its proper divisors (16521205632).

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

9929985792 is a wasteful number, since it uses less digits than its factorization.

9929985792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11245 (or 11231 counting only the distinct ones).

The product of its digits is 66134880, while the sum is 69.

The square root of 9929985792 is about 99649.3140568464. The cubic root of 9929985792 is about 2149.3948750954.

The spelling of 9929985792 in words is "nine billion, nine hundred twenty-nine million, nine hundred eighty-five thousand, seven hundred ninety-two".