7989449896 has 16 divisors (see below), whose sum is σ = 15003525600. Its totient is φ = 3988509744.

The previous prime is 7989449869. The next prime is 7989449987. The reversal of 7989449896 is 6989449897.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771436 + ... + 781723.

It is an arithmetic number, because the mean of its divisors is an integer number (937720350).

Almost surely, 2^7989449896 is an apocalyptic number.

It is an amenable number.

7989449896 is a deficient number, since it is larger than the sum of its proper divisors (7014075704).

7989449896 is a wasteful number, since it uses less digits than its factorization.

7989449896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553808 (or 1553804 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 73.

The square root of 7989449896 is about 89383.7227687458. The cubic root of 7989449896 is about 1999.1204379086.

Subtracting from 7989449896 its reverse (6989449897), we obtain a palindrome (999999999).

The spelling of 7989449896 in words is "seven billion, nine hundred eighty-nine million, four hundred forty-nine thousand, eight hundred ninety-six".