9886705640 has 128 divisors (see below), whose sum is σ = 26964887040. Its totient is φ = 3184828416.

The previous prime is 9886705627. The next prime is 9886705643. The reversal of 9886705640 is 465076889.

9886705640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9886705643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3459092 + ... + 3461948.

It is an arithmetic number, because the mean of its divisors is an integer number (210663180).

Almost surely, 2^9886705640 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 9886705640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13482443520).

9886705640 is an abundant number, since it is smaller than the sum of its proper divisors (17078181400).

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

9886705640 is a wasteful number, since it uses less digits than its factorization.

9886705640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3619 (or 3615 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 53.

The square root of 9886705640 is about 99431.9145948623. The cubic root of 9886705640 is about 2146.2675924217.

The spelling of 9886705640 in words is "nine billion, eight hundred eighty-six million, seven hundred five thousand, six hundred forty".