7989449828 has 24 divisors (see below), whose sum is σ = 14436624384. Its totient is φ = 3864772800.

The previous prime is 7989449827. The next prime is 7989449869. The reversal of 7989449828 is 8289449897.

It is not an unprimeable number, because it can be changed into a prime (7989449827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592376 + ... + 605712.

It is an arithmetic number, because the mean of its divisors is an integer number (601526016).

Almost surely, 2^7989449828 is an apocalyptic number.

It is an amenable number.

7989449828 is a deficient number, since it is larger than the sum of its proper divisors (6447174556).

7989449828 is a wasteful number, since it uses less digits than its factorization.

7989449828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18203 (or 18201 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 68.

The square root of 7989449828 is about 89383.7223883633. The cubic root of 7989449828 is about 1999.1204322370.

The spelling of 7989449828 in words is "seven billion, nine hundred eighty-nine million, four hundred forty-nine thousand, eight hundred twenty-eight".