9889613440 has 128 divisors (see below), whose sum is σ = 27530305920. Its totient is φ = 3326668800.

The previous prime is 9889613399. The next prime is 9889613441. The reversal of 9889613440 is 443169889.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (9889613441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216615 + ... + 258265.

It is an arithmetic number, because the mean of its divisors is an integer number (215080515).

Almost surely, 2^9889613440 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 9889613440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13765152960).

9889613440 is an abundant number, since it is smaller than the sum of its proper divisors (17640692480).

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

9889613440 is a wasteful number, since it uses less digits than its factorization.

9889613440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41730 (or 41718 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 9889613440 is about 99446.5355857106. The cubic root of 9889613440 is about 2146.4779862370.

The spelling of 9889613440 in words is "nine billion, eight hundred eighty-nine million, six hundred thirteen thousand, four hundred forty".