870

870 is a natural number that comes after 869 and before 871. In mathematics, it factors as 2 × 3 × 5 × 29, making it even and composite. It has 16 positive divisors, and it can be written as the product of two consecutive integers, 29 and 30. The sum of its divisors is 2160. In Roman numerals, 870 is DCCCLXX. The digits sum to 15, and 870 is divisible by 15, making it a Harshad number in base 10.

In practical use, 870 appears in infrastructure and culture. Area code 870 covers a large portion of Arkansas in the United States, including extensive rural and suburban areas outside the central Little Rock region. The number is also associated with a notable firearm: the Remington Model 870, a pump-action shotgun introduced in the 1950s that has become widely used by law enforcement and civilian shooters.

Historically, 870 refers to the year 870 CE, a date in the early medieval period. It sits in a time of fragmented polities and evolving regional powers across Europe, the Middle East, and parts of Asia, though specific events associated with that year vary by region and historical source.

Beyond these uses, 870 functions as a general numeric label in catalogs, models, and codes, reflecting its role as a common, versatile integer in everyday notation.