9939984 has 40 divisors (see below), whose sum is σ = 25861440. Its totient is φ = 3289728.

The previous prime is 9939971. The next prime is 9940001. The reversal of 9939984 is 4899399.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6877 + ... + 8195.

It is an arithmetic number, because the mean of its divisors is an integer number (646536).

Almost surely, 2^9939984 is an apocalyptic number.

It is an amenable number.

9939984 is an abundant number, since it is smaller than the sum of its proper divisors (15921456).

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

9939984 is a wasteful number, since it uses less digits than its factorization.

9939984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487 (or 1481 counting only the distinct ones).

The product of its digits is 629856, while the sum is 51.

The square root of 9939984 is about 3152.7740166399. The cubic root of 9939984 is about 215.0116020420.

The spelling of 9939984 in words is "nine million, nine hundred thirty-nine thousand, nine hundred eighty-four".