4 (number)
| ||||
|---|---|---|---|---|
| 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 | |||
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.
Mathematics
[change | change source]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 on each hand and four toes on each foot.[source?] Four squared is 16, and four doubled is 8.
In geometry, quadrilaterals or tetragons are a kind of shapes called polygons have four sides and vertices, to which squares are quadrilaterals with sides of same length and vertices of the same wideness.
