140 (number)
From Wikipedia, the free encyclopedia
140 is the natural number following 139 and preceding 141.
| Cardinal | One hundred [and] forty |
| Ordinal | 140th |
| Factorization |  |
| Divisors | 2, 4, 5, 7, 10, 14, 20, 28, 35, 70 |
| Roman numeral | CXL |
| Binary | 10001100 |
| Octal | 214 |
| Hexadecimal | 8c |
[edit] In mathematics
140 is an abundant number and a harmonic divisor number. It is the sum of the squares of the first seven integers, which makes it a square pyramidal number, and in base 10 it is divisible by the sum of its digits, which makes it a Harshad number.
The sum of Euler's totient function φ(x) over the first twenty-one integers is 140.
[edit] In other fields
One hundred [and] forty is also:
- The age Job died at (Bible, Job 42:16).
- The year AD 140 or 140 BC.
- The number of characters allowed in a standard text message.
