540444 has 24 divisors (see below), whose sum is σ = 1305360. Its totient is φ = 173824.

The previous prime is 540437. The next prime is 540461. The reversal of 540444 is 444045.

540444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 540444.

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 540444.

It is an unprimeable number.

540444 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429 + ... + 1124.

It is an arithmetic number, because the mean of its divisors is an integer number (54390).

2⁵⁴⁰⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

540444 is an abundant number, since it is smaller than the sum of its proper divisors (764916).

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

540444 is a wasteful number, since it uses less digits than its factorization.

540444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1587 counting only the distinct ones).

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

The square root of 540444 is about 735.1489644963. The cubic root of 540444 is about 81.4548409286.

Adding to 540444 its reverse (444045), we get a palindrome (984489).

The spelling of 540444 in words is "five hundred forty thousand, four hundred forty-four".