7989320688 has 40 divisors (see below), whose sum is σ = 20642311248. Its totient is φ = 2662689792.

The previous prime is 7989320683. The next prime is 7989320723. The reversal of 7989320688 is 8860239897.

It is a Cunningham number, because it is equal to 89383²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7989320681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528856 + ... + 543752.

Almost surely, 2^7989320688 is an apocalyptic number.

It is an amenable number.

7989320688 is an abundant number, since it is smaller than the sum of its proper divisors (12652990560).

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

7989320688 is a wasteful number, since it uses less digits than its factorization.

7989320688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26081 (or 26075 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The square root of 7989320688 is about 89382.9999944061. Note that the first 5 decimals coincide. The cubic root of 7989320688 is about 1999.1096610404.

The spelling of 7989320688 in words is "seven billion, nine hundred eighty-nine million, three hundred twenty thousand, six hundred eighty-eight".