4445544448 has 56 divisors (see below), whose sum is σ = 8918577540. Its totient is φ = 2215772160.

The previous prime is 4445544419. The next prime is 4445544451. The reversal of 4445544448 is 8444455444.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4286582784 + 158961664 = 65472^2 + 12608^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4445544398 and 4445544407.

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, 3448188 + ... + 3449476.

Almost surely, 2^4445544448 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 4445544448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4459288770).

4445544448 is an abundant number, since it is smaller than the sum of its proper divisors (4473033092).

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

4445544448 is an equidigital number, since it uses as much as digits as its factorization.

4445544448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736 (or 1712 counting only the distinct ones).

The product of its digits is 3276800, while the sum is 46.

The square root of 4445544448 is about 66674.9161829244. The cubic root of 4445544448 is about 1644.2770138005.

The spelling of 4445544448 in words is "four billion, four hundred forty-five million, five hundred forty-four thousand, four hundred forty-eight".