440538 has 32 divisors (see below), whose sum is σ = 1067904. Its totient is φ = 118272.

The previous prime is 440537. The next prime is 440543. The reversal of 440538 is 835044.

It is a happy number.

440538 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 440538.

It is not an unprimeable number, because it can be changed into a prime (440537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406 + ... + 1022.

It is an arithmetic number, because the mean of its divisors is an integer number (33372).

2⁴⁴⁰⁵³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 440538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533952).

440538 is an abundant number, since it is smaller than the sum of its proper divisors (627366).

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

440538 is a wasteful number, since it uses less digits than its factorization.

440538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 440538 is about 663.7303669413. The cubic root of 440538 is about 76.0900364136.

The spelling of 440538 in words is "four hundred forty thousand, five hundred thirty-eight".