505538 has 12 divisors (see below), whose sum is σ = 833910. Its totient is φ = 229680.

The previous prime is 505537. The next prime is 505559. The reversal of 505538 is 835505.

It can be written as a sum of positive squares in only one way, i.e., 339889 + 165649 = 583^2 + 407^2 .

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505538.

It is not an unprimeable number, because it can be changed into a prime (505537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 803 + ... + 1286.

2⁵⁰⁵⁵³⁸ is an apocalyptic number.

505538 is a deficient number, since it is larger than the sum of its proper divisors (328372).

505538 is a wasteful number, since it uses less digits than its factorization.

505538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113 (or 2102 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 505538 is about 711.0119548925. The cubic root of 505538 is about 79.6620115586.

The spelling of 505538 in words is "five hundred five thousand, five hundred thirty-eight".