It is a happy number.
It is an alternating number because its digits alternate between odd and even.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 509436.
It is an unprimeable number.
2509436 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 509436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (680400).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
509436 is a wasteful number, since it uses less digits than its factorization.
509436 is an odious number, because the sum of its binary digits is odd.
The square root of 509436 is about 713.7478546378. The cubic root of 509436 is about 79.8662347939.
The spelling of 509436 in words is "five hundred nine thousand, four hundred thirty-six".