9889385440 has 96 divisors (see below), whose sum is σ = 26595910656. Its totient is φ = 3439772160.

The previous prime is 9889385413. The next prime is 9889385447. The reversal of 9889385440 is 445839889.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9889385447) 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, 81672 + ... + 162631.

It is an arithmetic number, because the mean of its divisors is an integer number (277040736).

Almost surely, 2^9889385440 is an apocalyptic number.

It is an amenable number.

9889385440 is an abundant number, since it is smaller than the sum of its proper divisors (16706525216).

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

9889385440 is a wasteful number, since it uses less digits than its factorization.

9889385440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244352 (or 244344 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 58.

The square root of 9889385440 is about 99445.3892344939. The cubic root of 9889385440 is about 2146.4614907914.

The spelling of 9889385440 in words is "nine billion, eight hundred eighty-nine million, three hundred eighty-five thousand, four hundred forty".