9881329086 has 24 divisors (see below), whose sum is σ = 21772422360. Its totient is φ = 3237949296.

The previous prime is 9881329049. The next prime is 9881329097. The reversal of 9881329086 is 6809231889.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4651165 + ... + 4653288.

It is an arithmetic number, because the mean of its divisors is an integer number (907184265).

Almost surely, 2^9881329086 is an apocalyptic number.

9881329086 is an abundant number, since it is smaller than the sum of its proper divisors (11891093274).

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

9881329086 is a wasteful number, since it uses less digits than its factorization.

9881329086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9304520 (or 9304517 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 9881329086 is about 99404.8745585447. The cubic root of 9881329086 is about 2145.8784632734.

The spelling of 9881329086 in words is "nine billion, eight hundred eighty-one million, three hundred twenty-nine thousand, eighty-six".