444021144 has 96 divisors (see below), whose sum is σ = 1322924400. Its totient is φ = 123755520.

The previous prime is 444021143. The next prime is 444021169. The reversal of 444021144 is 441120444.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444021143) 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, 43612 + ... + 52820.

Almost surely, 2^444021144 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 444021144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (661462200).

444021144 is an abundant number, since it is smaller than the sum of its proper divisors (878903256).

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

444021144 is a wasteful number, since it uses less digits than its factorization.

444021144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9273 (or 9262 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 444021144 is about 21071.8092246489. The cubic root of 444021144 is about 762.9004723867.

Adding to 444021144 its reverse (441120444), we get a palindrome (885141588).

The spelling of 444021144 in words is "four hundred forty-four million, twenty-one thousand, one hundred forty-four".