505544 has 16 divisors (see below), whose sum is σ = 1021020. Its totient is φ = 233280.

The previous prime is 505537. The next prime is 505559. The reversal of 505544 is 445505.

It can be written as a sum of positive squares in 2 ways, for example, as 504100 + 1444 = 710^2 + 38^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505544.

It is an unprimeable number.

505544 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2327 + ... + 2534.

2⁵⁰⁵⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

505544 is an abundant number, since it is smaller than the sum of its proper divisors (515476).

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

505544 is a wasteful number, since it uses less digits than its factorization.

505544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4880 (or 4876 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 505544 is about 711.0161742183. The cubic root of 505544 is about 79.6623267147.

Subtracting from 505544 its sum of digits (23), we obtain a square (505521 = 711²).

The spelling of 505544 in words is "five hundred five thousand, five hundred forty-four".