444440 has 32 divisors (see below), whose sum is σ = 1028160. Its totient is φ = 172800.

The previous prime is 444421. The next prime is 444443. The reversal of 444440 is 44444.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1505 + ... + 1775.

It is an arithmetic number, because the mean of its divisors is an integer number (32130).

2⁴⁴⁴⁴⁴⁰ is an apocalyptic number.

444440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 444440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514080).

444440 is an abundant number, since it is smaller than the sum of its proper divisors (583720).

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

444440 is a wasteful number, since it uses less digits than its factorization.

444440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 444440 is about 666.6633333250. The cubic root of 444440 is about 76.3140284551.

444440 divided by its sum of digits (20) gives a palindrome (22222).

Adding to 444440 its reverse (44444), we get a palindrome (488884).

It can be divided in two parts, 4 and 44440, that added together give a palindrome (44444).

The spelling of 444440 in words is "four hundred forty-four thousand, four hundred forty", and thus it is an iban number.