505686 has 16 divisors (see below), whose sum is σ = 1018368. Its totient is φ = 167400.

The previous prime is 505669. The next prime is 505691. The reversal of 505686 is 686505.

It is a congruent number.

It is an unprimeable number.

505686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 1471 + ... + 1781.

It is an arithmetic number, because the mean of its divisors is an integer number (63648).

2⁵⁰⁵⁶⁸⁶ is an apocalyptic number.

505686 is an abundant number, since it is smaller than the sum of its proper divisors (512682).

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

505686 is a wasteful number, since it uses less digits than its factorization.

505686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 505686 is about 711.1160242886. The cubic root of 505686 is about 79.6697846818.

The spelling of 505686 in words is "five hundred five thousand, six hundred eighty-six".