505044 has 18 divisors (see below), whose sum is σ = 1276730. Its totient is φ = 168336.

The previous prime is 505033. The next prime is 505049. The reversal of 505044 is 440505.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 291600 + 213444 = 540^2 + 462^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505049) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 6979 + ... + 7050.

2⁵⁰⁵⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

505044 is an abundant number, since it is smaller than the sum of its proper divisors (771686).

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

505044 is a wasteful number, since it uses less digits than its factorization.

505044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14039 (or 14034 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 505044 is about 710.6644777953. The cubic root of 505044 is about 79.6360551459.

Adding to 505044 its reverse (440505), we get a palindrome (945549).

The spelling of 505044 in words is "five hundred five thousand, forty-four".