505386 has 48 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 143640.

The previous prime is 505369. The next prime is 505399. The reversal of 505386 is 683505.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 2551 + ... + 2741.

It is an arithmetic number, because the mean of its divisors is an integer number (27360).

2⁵⁰⁵³⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (656640).

505386 is an abundant number, since it is smaller than the sum of its proper divisors (807894).

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

505386 is a wasteful number, since it uses less digits than its factorization.

505386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 505386 is about 710.9050569521. The cubic root of 505386 is about 79.6540267718.

The spelling of 505386 in words is "five hundred five thousand, three hundred eighty-six".