504540 has 36 divisors (see below), whose sum is σ = 1530984. Its totient is φ = 134496.

The previous prime is 504527. The next prime is 504547. The reversal of 504540 is 45405.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×504540² = 509121223200, which contains 22 as substring.

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

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504547) by changing a digit.

504540 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 11 ways as a sum of consecutive naturals, for example, 1222 + ... + 1581.

2⁵⁰⁴⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

504540 is an abundant number, since it is smaller than the sum of its proper divisors (1026444).

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

504540 is a wasteful number, since it uses less digits than its factorization.

504540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818 (or 2813 counting only the distinct ones).

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

The square root of 504540 is about 710.3097915698. The cubic root of 504540 is about 79.6095558505.

Adding to 504540 its reverse (45405), we get a palindrome (549945).

The spelling of 504540 in words is "five hundred four thousand, five hundred forty".