The number "twenty-eight" is an integer that comes after twenty-seven and before twenty-nine. It is represented as 28 in numerical form. In mathematics, twenty-eight is an even number, meaning it can be divided by two without leaving a remainder. It is also a composite number, as it has factors other than one and itself, specifically 1, 2, 4, 7, 14, and 28. In terms of time, there are typically twenty-eight days in the month of February, except in leap years when it has twenty-nine days. Additionally, twenty-eight is significant in various cultures and contexts, such as the 28th Amendment in the United States Constitution, which addresses specific rights and regulations.