140 (number)
From Halbeeg, the open encyclopedia · Af-Soomaali
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140 is a natural number that follows 139 and precedes 141. It is a composite number, meaning it has divisors other than 1 and itself.
In the decimal system, 140 comprises three digits: 1, 4, and 0. It is an even number and is divisible by 10, because it ends in zero.
Mathematical properties
The prime factorization of 140 is 2² × 5 × 7. Its divisors are 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, and 140—a total of 12 divisors. The sum of its divisors other than itself is 196, which exceeds 140; therefore 140 is an abundant number.
140 is also a square pyramidal number: it equals the sum of the squares of the integers 1 through 7, that is 1 + 4 + 9 + 16 + 25 + 36 + 49 = 140. It thus represents the number of spheres that can fill a pyramid with a square base of 7 × 7.
General usage
The number 140 appears in many everyday measurements: years, road numbers, and scientific limits. A notable example is Twitter, which for a long period imposed a character limit of 140 characters per post, a restriction that was later increased.
In various languages, 140 is named according to the counting system of each language: in Somali "boqol iyo afartan" (one hundred and forty), in English "one hundred forty", in Arabic "مئة وأربعون".