1440444 has 48 divisors (see below), whose sum is σ = 3725568. Its totient is φ = 430848.

The previous prime is 1440443. The next prime is 1440449. The reversal of 1440444 is 4440441.

It is a self number, because there is not a number n which added to its sum of digits gives 1440444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440443) 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, 4539 + ... + 4845.

It is an arithmetic number, because the mean of its divisors is an integer number (77616).

2^1440444 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 1440444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862784).

1440444 is an abundant number, since it is smaller than the sum of its proper divisors (2285124).

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

1440444 is a wasteful number, since it uses less digits than its factorization.

1440444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 1440444 is about 1200.1849857418. The cubic root of 1440444 is about 112.9359283841.

Adding to 1440444 its reverse (4440441), we get a palindrome (5880885).

The spelling of 1440444 in words is "one million, four hundred forty thousand, four hundred forty-four".