9989440 has 112 divisors (see below), whose sum is σ = 26334720. Its totient is φ = 3594240.

The previous prime is 9989437. The next prime is 9989477. The reversal of 9989440 is 449899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188454 + ... + 188506.

Almost surely, 2^9989440 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 9989440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13167360).

9989440 is an abundant number, since it is smaller than the sum of its proper divisors (16345280).

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

9989440 is a wasteful number, since it uses less digits than its factorization.

9989440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 9989440 is about 3160.6075365347. The cubic root of 9989440 is about 215.3676061921.

The spelling of 9989440 in words is "nine million, nine hundred eighty-nine thousand, four hundred forty".