118 (one hundred [and] eighteen) is the natural number following 117 and preceding 119.
| ||||
|---|---|---|---|---|
| Cardinal | one hundred eighteen | |||
| Ordinal | 118th (one hundred eighteenth) | |||
| Factorization | 2 × 59 | |||
| Divisors | 1, 2, 59, 118 | |||
| Greek numeral | ΡΙΗ´ | |||
| Roman numeral | CXVIII | |||
| Binary | 11101102 | |||
| Ternary | 111013 | |||
| Octal | 1668 | |||
| Duodecimal | 9A12 | |||
| Hexadecimal | 7616 | |||
In mathematicsEdit
There is no answer to the equation φ(x) = 118, making 118 a nontotient.
118 is the smallest n such that the range n, n + 1, ... 4n/3 contains at least one prime from each of these forms: 4x + 1, 4x - 1, 6x + 1 and 6x - 1.
Four expressions for 118 as the sum of three positive integers have the same product:
- 14 + 50 + 54 = 15 + 40 + 63 = 18 + 30 + 70 = 21 + 25 + 72 = 118 and
- 14 × 50 × 54 = 15 × 40 × 63 = 18 × 30 × 70 = 21 × 25 × 72 = 37800.
118 is the smallest number that can be expressed as four sums with the same product in this way.[1]
118 is a Leyland number of the second kind.
118!! - 1 is prime[2]
In telephonyEdit
- The beginning of directory enquiries numbers in the United Kingdom,[3] France, Germany, Greece, Latvia, Sweden, Ireland, Iran and Turkey
- The emergency at sea emergency telephone number in Japan
- The fire emergency telephone number in Switzerland and Maldives
- The medical emergency telephone number in Bolivia and Indonesia
- The emergency medical services in Italy
In other fieldsEdit
One hundred and eighteen is also:
- Oganesson, an element with atomic number 118
- 118, a 255-episode Singaporean television drama airing from 2014 to 2015
- The number of elements in the Periodic Table.
- The 118th Tactical Fighter Squadron "Mobius", a fictional fighter squadron in Ace Combat 04: Shattered Skies
In datesEdit
- 1/18 can also represent the day January 18. The 118th day of the year is April 28, on regular years. On leap years it is April 27.
See alsoEdit
ReferencesEdit
| Wikimedia Commons has media related to 118 (number). |
- ^ Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 134 - 135
- ^ Sloane, N. J. A. (ed.). "Sequence A007749 (Numbers k such that k!! - 1 is prime)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2022-05-24.
- ^ List of UK 118 directory enquiry services