140

140 is the natural number that comes after 139 and before 141. In base-10 notation it is written as 140. Its representations in other common bases are: binary 10001100, octal 214, and hexadecimal 8C. In Roman numerals it is written as CXL. The number is even and composite, with prime factorization 2^2 × 5 × 7 and 12 positive divisors.

Mathematically, 140 is an abundant number because the sum of its proper divisors (1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70) equals 196, which is greater than 140. It is not a prime, not a square, and not a cube. It is the product of small primes and its divisor structure reflects that factorization.

Culturally, 140 is notable for its historical association with the character limit of early Twitter messages, which was 140 characters from 2006 until expanded to 280 in 2017. The limit influenced memes and communication practices, and is sometimes used as a shorthand for brief, tweet-length statements.

In other uses, 140 appears in calendars as a year in the Anno Domini era, or in various lists of numbers such as street or model numbers. It also serves as a useful benchmark in numeral systems: 140 decimal equals 0x8C in hexadecimal, 214 in octal, and 10001100 in binary. In English, it is commonly rendered as “one hundred forty” (American usage) or “one hundred and forty” (some British usage).