7989243808 has 288 divisors, whose sum is σ = 20475504000. Its totient is φ = 3064449024.

The previous prime is 7989243751. The next prime is 7989243809. The reversal of 7989243808 is 8083429897.

It is a super-4 number, since 4×7989243808⁴ (a number of 41 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (7989243809) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109441660 + ... + 109441732.

It is an arithmetic number, because the mean of its divisors is an integer number (71095500).

Almost surely, 2^7989243808 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 7989243808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10237752000).

7989243808 is an abundant number, since it is smaller than the sum of its proper divisors (12486260192).

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

7989243808 is a wasteful number, since it uses less digits than its factorization.

7989243808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 58.

The square root of 7989243808 is about 89382.5699339642. The cubic root of 7989243808 is about 1999.1032486453.

The spelling of 7989243808 in words is "seven billion, nine hundred eighty-nine million, two hundred forty-three thousand, eight hundred eight".