240 (number)
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240 is a natural number that follows 239 and precedes 241. It is an even number, divisible by two with no remainder. In the decimal number system it consists of three digits: two hundred, forty, and zero.
240 is notable for having an unusually large number of divisors compared to numbers of similar magnitude. For this reason it appears in mathematical classifications of highly composite numbers, and is used in systems of measurement and division that employ many factors.
Mathematical properties
The prime factorization of 240 is 2 to the fourth power, multiplied by 3, then multiplied by 5—written as 2⁴ × 3 × 5. Because of this structure, 240 has many divisors, including 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, and 240 itself.
240 is also an even number and not a prime number. It is divisible by all integers from 1 to 6, which makes it suitable for dividing small equal groups.
Common uses
240 appears in the electrical systems of many countries, where household voltage is approximately 240 volts or 230–240 volts. It also appears in angle measurement: 240 degrees is two-thirds of a complete rotation of 360 degrees.
In time, 240 minutes equals four hours. The time-reckoning system based on units of 60 makes 240 a number convenient to work with.