4 (number)
natural number
The number four is a number and a numeral. It comes after the number three, and before the number five. In Roman numerals, it is IV.
| ||||
|---|---|---|---|---|
| Cardinal | four | |||
| Ordinal | 4th (fourth) | |||
| Numeral system | quaternary | |||
| Factorization | 22 | |||
| Divisors | 1, 2, 4 | |||
| Greek numeral | Δ´ | |||
| Roman numeral | IV | |||
| Roman numeral (unicode) | Ⅳ, ⅳ | |||
| Greek prefix | tetra- | |||
| Latin prefix | quadri-/quadr- | |||
| Binary | 1002 | |||
| Ternary | 113 | |||
| Quaternary | 104 | |||
| Quinary | 45 | |||
| Senary | 46 | |||
| Octal | 48 | |||
| Duodecimal | 412 | |||
| Hexadecimal | 416 | |||
| Vigesimal | 420 | |||
| Base 36 | 436 | |||
| Greek | δ (or Δ) | |||
| Arabic | ٤,4 | |||
| Persian | ۴ | |||
| Urdu |  | |||
| Ge'ez | ፬ | |||
| Bengali | ৪ | |||
| Chinese numeral | 四，亖，肆 | |||
| Korean | 넷,사 | |||
| Devanagari | ४ | |||
| Telugu | ౪ | |||
| Malayalam | ൪ | |||
| Tamil | ௪ | |||
| Hebrew | ארבע (Arba, pronounced AR-bah) or ד (Dalet, 4th letter of the Hebrew alphabet) | |||
| Khmer | ៤ | |||
| Thai | ๔ | |||
| Kannada | ४ | |||
MathematicsEdit
In mathematics, the number four is an even number and the smallest composite number. Four is also the second square number after one. A small minority of people have four fingers and four toes, on each hand and foot, respectively. This proves difficult to count on your fingers. Four squared is 16, and four doubled is 8.
