504240 has 80 divisors (see below), whose sum is σ = 1714176. Its totient is φ = 121600.

The previous prime is 504221. The next prime is 504247. The reversal of 504240 is 42405.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (504247) by changing a digit.

504240 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 15 ways as a sum of consecutive naturals, for example, 2545 + ... + 2735.

2⁵⁰⁴²⁴⁰ 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 504240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857088).

504240 is an abundant number, since it is smaller than the sum of its proper divisors (1209936).

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

504240 is a wasteful number, since it uses less digits than its factorization.

504240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 504240 is about 710.0985847050. The cubic root of 504240 is about 79.5937740810.

Adding to 504240 its reverse (42405), we get a palindrome (546645).

The spelling of 504240 in words is "five hundred four thousand, two hundred forty".