9987784704 has 320 divisors, whose sum is σ = 30830809680. Its totient is φ = 3220439040.

The previous prime is 9987784621. The next prime is 9987784717. The reversal of 9987784704 is 4074877899.

It is a happy number.

9987784704 is a `hidden beast` number, since 9 + 98 + 7 + 78 + 470 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 140672989 + ... + 140673059.

Almost surely, 2^9987784704 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 9987784704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15415404840).

9987784704 is an abundant number, since it is smaller than the sum of its proper divisors (20843024976).

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

9987784704 is an frugal number, since it uses more digits than its factorization.

9987784704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The square root of 9987784704 is about 99938.9048569175. The cubic root of 9987784704 is about 2153.5570973513.

The spelling of 9987784704 in words is "nine billion, nine hundred eighty-seven million, seven hundred eighty-four thousand, seven hundred four".