Ninety Thousand, or 90,000, is a Numberblock made up of 90,000 blocks.
He appeared in More to Explore as his only appearance, as a component of Ninety-Seven Thousand One Hundred and Four.
Ninety Thousand is a giant Ninety, being a thousand times larger. Unlike Ninety, Ninety Thousand can form a square of 300×300. However, he has rectangular eyes like Ninety's. This is because he is also a super rectangle, who can make many more forms.