7989984 has 36 divisors (see below), whose sum is σ = 22722336. Its totient is φ = 2663232.

The previous prime is 7989973. The next prime is 7990001. The reversal of 7989984 is 4899897.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 7989984.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13584 + ... + 14159.

It is an arithmetic number, because the mean of its divisors is an integer number (631176).

Almost surely, 2^7989984 is an apocalyptic number.

It is an amenable number.

7989984 is an abundant number, since it is smaller than the sum of its proper divisors (14732352).

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

7989984 is a wasteful number, since it uses less digits than its factorization.

7989984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27759 (or 27748 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 7989984 is about 2826.6559748225. The cubic root of 7989984 is about 199.9164984757.

The spelling of 7989984 in words is "seven million, nine hundred eighty-nine thousand, nine hundred eighty-four".