504840 has 64 divisors (see below), whose sum is σ = 1733760. Its totient is φ = 115200.

The previous prime is 504821. The next prime is 504851. The reversal of 504840 is 48405.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

504840 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, 540 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (27090).

2⁵⁰⁴⁸⁴⁰ 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 504840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866880).

504840 is an abundant number, since it is smaller than the sum of its proper divisors (1228920).

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

504840 is a wasteful number, since it uses less digits than its factorization.

504840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 504840 is about 710.5209356521. The cubic root of 504840 is about 79.6253313653.

The spelling of 504840 in words is "five hundred four thousand, eight hundred forty".