540504 has 24 divisors (see below), whose sum is σ = 1464060. Its totient is φ = 180144.

The previous prime is 540469. The next prime is 540509. The reversal of 540504 is 405045.

It is a happy number.

540504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540509) by changing a digit.

540504 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 5 ways as a sum of consecutive naturals, for example, 3682 + ... + 3825.

2⁵⁴⁰⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

540504 is an abundant number, since it is smaller than the sum of its proper divisors (923556).

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

540504 is a wasteful number, since it uses less digits than its factorization.

540504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7519 (or 7512 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 540504 is about 735.1897714196. The cubic root of 540504 is about 81.4578551845.

Adding to 540504 its reverse (405045), we get a palindrome (945549).

The spelling of 540504 in words is "five hundred forty thousand, five hundred four".