The number 8 is a whole number that follows 7 and precedes 9. It is an even number, meaning it can be divided by 2 without leaving a remainder. In mathematics, 8 is the cube of 2, as 2^3 = 8. It is also the first cube number after 1. In various cultures, the number 8 holds significant meanings. For example, in Chinese culture, it is considered a lucky number because it sounds like the word for wealth or prosperity. Additionally, in geometry, an octagon is a shape with eight sides, further illustrating the importance of this number in different contexts.