9889207440 has 240 divisors, whose sum is σ = 35904309120. Its totient is φ = 2245017600.

The previous prime is 9889207409. The next prime is 9889207453. The reversal of 9889207440 is 447029889.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1772976 + ... + 1778544.

It is an arithmetic number, because the mean of its divisors is an integer number (149601288).

Almost surely, 2^9889207440 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 9889207440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17952154560).

9889207440 is an abundant number, since it is smaller than the sum of its proper divisors (26015101680).

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

9889207440 is a wasteful number, since it uses less digits than its factorization.

9889207440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750 (or 5737 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 9889207440 is about 99444.4942669025. The cubic root of 9889207440 is about 2146.4486125919.

The spelling of 9889207440 in words is "nine billion, eight hundred eighty-nine million, two hundred seven thousand, four hundred forty".