9986803880 has 16 divisors (see below), whose sum is σ = 22470308820. Its totient is φ = 3994721536.

The previous prime is 9986803859. The next prime is 9986803891. The reversal of 9986803880 is 883086899.

It can be written as a sum of positive squares in 2 ways, for example, as 8961651556 + 1025152324 = 94666^2 + 32018^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124835009 + ... + 124835088.

Almost surely, 2^9986803880 is an apocalyptic number.

It is an amenable number.

9986803880 is an abundant number, since it is smaller than the sum of its proper divisors (12483504940).

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

9986803880 is a wasteful number, since it uses less digits than its factorization.

9986803880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249670108 (or 249670104 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 9986803880 is about 99933.9976184281. The cubic root of 9986803880 is about 2153.4866002492.

The spelling of 9986803880 in words is "nine billion, nine hundred eighty-six million, eight hundred three thousand, eight hundred eighty".