505808 has 20 divisors (see below), whose sum is σ = 992868. Its totient is φ = 249600.

The previous prime is 505781. The next prime is 505811. The reversal of 505808 is 808505.

It can be written as a sum of positive squares in 2 ways, for example, as 222784 + 283024 = 472^2 + 532^2 .

It is a congruent number.

It is an unprimeable number.

505808 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 3 ways as a sum of consecutive naturals, for example, 1460 + ... + 1772.

2⁵⁰⁵⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

505808 is a deficient number, since it is larger than the sum of its proper divisors (487060).

505808 is a wasteful number, since it uses less digits than its factorization.

505808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 505808 is about 711.2017997728. The cubic root of 505808 is about 79.6761911159.

The spelling of 505808 in words is "five hundred five thousand, eight hundred eight".