9991344 has 80 divisors (see below), whose sum is σ = 28569600. Its totient is φ = 2983680.

The previous prime is 9991343. The next prime is 9991349. The reversal of 9991344 is 4431999.

It is not an unprimeable number, because it can be changed into a prime (9991343) 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, 66982 + ... + 67130.

It is an arithmetic number, because the mean of its divisors is an integer number (357120).

Almost surely, 2^9991344 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 9991344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14284800).

9991344 is an abundant number, since it is smaller than the sum of its proper divisors (18578256).

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

9991344 is a wasteful number, since it uses less digits than its factorization.

9991344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 292 counting only the distinct ones).

The product of its digits is 34992, while the sum is 39.

The square root of 9991344 is about 3160.9087300965. The cubic root of 9991344 is about 215.3812884363.

The spelling of 9991344 in words is "nine million, nine hundred ninety-one thousand, three hundred forty-four".