444544140 has 96 divisors (see below), whose sum is σ = 1342333440. Its totient is φ = 109555200.

The previous prime is 444544117. The next prime is 444544141. The reversal of 444544140 is 41445444.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 444544098 and 444544107.

It is not an unprimeable number, because it can be changed into a prime (444544141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41985 + ... + 51495.

It is an arithmetic number, because the mean of its divisors is an integer number (13982640).

Almost surely, 2^444544140 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 444544140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (671166720).

444544140 is an abundant number, since it is smaller than the sum of its proper divisors (897789300).

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

444544140 is a wasteful number, since it uses less digits than its factorization.

444544140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9583 (or 9581 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 30.

The square root of 444544140 is about 21084.2154229177. The cubic root of 444544140 is about 763.1998855640.

Adding to 444544140 its reverse (41445444), we get a palindrome (485989584).

The spelling of 444544140 in words is "four hundred forty-four million, five hundred forty-four thousand, one hundred forty".