are numenoreans part elf

As I mentioned before, the term "numenorean" can refer to a variety of different beings, including both mortal humans and immortal elves. In the case of Sauron, who is a Maia, he is not an elf or a human, but rather a supernatural being with immense power and longevity. As for his ring, it was not created to control other elves, but rather to give him dominion over the other rings and the power of their wearers.