7989534784 has 112 divisors (see below), whose sum is σ = 19868083200. Its totient is φ = 3096783360.

The previous prime is 7989534769. The next prime is 7989534809. The reversal of 7989534784 is 4874359897.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (64).

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 15 ways as a sum of consecutive naturals, for example, 976599 + ... + 984745.

It is an arithmetic number, because the mean of its divisors is an integer number (177393600).

Almost surely, 2^7989534784 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 7989534784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9934041600).

7989534784 is an abundant number, since it is smaller than the sum of its proper divisors (11878548416).

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

7989534784 is a wasteful number, since it uses less digits than its factorization.

7989534784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8376 (or 8366 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 64.

The square root of 7989534784 is about 89384.1976190423. The cubic root of 7989534784 is about 1999.1275181097.

The spelling of 7989534784 in words is "seven billion, nine hundred eighty-nine million, five hundred thirty-four thousand, seven hundred eighty-four".