7989449804 has 72 divisors (see below), whose sum is σ = 16546178880. Its totient is φ = 3365107200.

The previous prime is 7989449803. The next prime is 7989449827. The reversal of 7989449804 is 4089449897.

It is not an unprimeable number, because it can be changed into a prime (7989449803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3730574 + ... + 3732714.

It is an arithmetic number, because the mean of its divisors is an integer number (229808040).

Almost surely, 2^7989449804 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 7989449804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8273089440).

7989449804 is an abundant number, since it is smaller than the sum of its proper divisors (8556729076).

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

7989449804 is a wasteful number, since it uses less digits than its factorization.

7989449804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479 (or 2470 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 62.

The square root of 7989449804 is about 89383.7222541107. The cubic root of 7989449804 is about 1999.1204302352.

The spelling of 7989449804 in words is "seven billion, nine hundred eighty-nine million, four hundred forty-nine thousand, eight hundred four".