Adding to 520304 its reverse (403025), we get a palindrome (923329).
520304 is an admirable number.
It is a zygodrome in base 2.
It is a congruent number.
520304 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2520304 is an apocalyptic number.
It is an amenable number.
520304 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
520304 is a wasteful number, since it uses less digits than its factorization.
520304 is an evil number, because the sum of its binary digits is even.
The square root of 520304 is about 721.3210103692. The cubic root of 520304 is about 80.4301826399.
The spelling of 520304 in words is "five hundred twenty thousand, three hundred four".