503660 has 12 divisors (see below), whose sum is σ = 1057728. Its totient is φ = 201456.

The previous prime is 503653. The next prime is 503663. The reversal of 503660 is 66305.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 25183 = 503660 / (5 + 0 + 3 + 6 + 6 + 0).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 503660.

It is not an unprimeable number, because it can be changed into a prime (503663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12572 + ... + 12611.

It is an arithmetic number, because the mean of its divisors is an integer number (88144).

2⁵⁰³⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

503660 is an abundant number, since it is smaller than the sum of its proper divisors (554068).

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

503660 is a wasteful number, since it uses less digits than its factorization.

503660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25192 (or 25190 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 503660 is about 709.6900732010. The cubic root of 503660 is about 79.5632449015.

Adding to 503660 its reverse (66305), we get a palindrome (569965).

The spelling of 503660 in words is "five hundred three thousand, six hundred sixty".