505590 has 32 divisors (see below), whose sum is σ = 1278720. Its totient is φ = 127584.

The previous prime is 505573. The next prime is 505601. The reversal of 505590 is 95505.

It is a self number, because there is not a number n which added to its sum of digits gives 505590.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127 + ... + 1013.

It is an arithmetic number, because the mean of its divisors is an integer number (39960).

2⁵⁰⁵⁵⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (639360).

505590 is an abundant number, since it is smaller than the sum of its proper divisors (773130).

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

505590 is a wasteful number, since it uses less digits than its factorization.

505590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916.

The product of its (nonzero) digits is 1125, while the sum is 24.

The square root of 505590 is about 711.0485215511. The cubic root of 505590 is about 79.6647428288.

The spelling of 505590 in words is "five hundred five thousand, five hundred ninety".