9931984 has 40 divisors (see below), whose sum is σ = 20827040. Its totient is φ = 4572288.

The previous prime is 9931951. The next prime is 9932009. The reversal of 9931984 is 4891399.

It is a self number, because there is not a number n which added to its sum of digits gives 9931984.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10807 + ... + 11689.

It is an arithmetic number, because the mean of its divisors is an integer number (520676).

Almost surely, 2^9931984 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 9931984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10413520).

9931984 is an abundant number, since it is smaller than the sum of its proper divisors (10895056).

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

9931984 is a wasteful number, since it uses less digits than its factorization.

9931984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 941 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 9931984 is about 3151.5050372798. The cubic root of 9931984 is about 214.9539039450.

The spelling of 9931984 in words is "nine million, nine hundred thirty-one thousand, nine hundred eighty-four".