8449021944 has 96 divisors (see below), whose sum is σ = 25015011840. Its totient is φ = 2554977600.

The previous prime is 8449021909. The next prime is 8449021949. The reversal of 8449021944 is 4491209448.

It is a self number, because there is not a number n which added to its sum of digits gives 8449021944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8449021949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378009 + ... + 399735.

It is an arithmetic number, because the mean of its divisors is an integer number (260573040).

Almost surely, 2^8449021944 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 8449021944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12507505920).

8449021944 is an abundant number, since it is smaller than the sum of its proper divisors (16565989896).

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

8449021944 is a wasteful number, since it uses less digits than its factorization.

8449021944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22241 (or 22234 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 8449021944 is about 91918.5614769944. The cubic root of 8449021944 is about 2036.7394685171.

The spelling of 8449021944 in words is "eight billion, four hundred forty-nine million, twenty-one thousand, nine hundred forty-four".