444540 has 48 divisors (see below), whose sum is σ = 1290240. Its totient is φ = 114240.

The previous prime is 444539. The next prime is 444547. The reversal of 444540 is 45444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1741 + ... + 1979.

It is an arithmetic number, because the mean of its divisors is an integer number (26880).

2⁴⁴⁴⁵⁴⁰ 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 444540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (645120).

444540 is an abundant number, since it is smaller than the sum of its proper divisors (845700).

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

444540 is a wasteful number, since it uses less digits than its factorization.

444540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 444540 is about 666.7383294817. The cubic root of 444540 is about 76.3197516352.

Adding to 444540 its reverse (45444), we get a palindrome (489984).

It can be divided in two parts, 4 and 44540, that added together give a palindrome (44544).

The spelling of 444540 in words is "four hundred forty-four thousand, five hundred forty".