8100

8100 is a positive integer that sits between 8099 and 8101. In mathematics, it is the square of 90, since 90 × 90 = 8100. Its prime factorization is 2^2 × 3^4 × 5^2, which implies it has 45 positive divisors. The digit sum is 8+1+0+0 = 9, so 8100 is a Harshad number in base 10, because 9 divides 8100. The sum of its proper divisors is 26257 − 8100 = 18157, which exceeds 8100, making 8100 an abundant number. In hexadecimal notation, 8100 is represented as 0x1FA4.

In terms of time and measurement, 8100 seconds equal 2 hours and 15 minutes (135 minutes). This highlights a practical way to relate the number to a familiar unit of time. As a square number, the square root of 8100 is 90, linking its arithmetic structure directly to a round integer.

Beyond pure arithmetic, 8100 may appear in various technical or catalog contexts as an identifying code or model number, or as a reference point in calendars or historical timelines when used as a year designation (for example, 8100 CE or 8100 BCE in fictional or hypothetical scenarios).