4
Everything about the number 4 — its names, how to write it in other bases and numeral systems, and what makes it interesting mathematically.
Advertisement
Names of 4
| Nominal | 4 |
| Cardinal | four |
| Ordinal | 4th |
| This number as US currency | four dollars |
Properties (and some facts) of 4
| Is 4 an odd number? | 4 is not an odd number |
| Is 4 an even number? | 4 is an even number |
| Is 4 a palindrome? | 4 is a palindrome |
| Is 4 a triangle number? | 4 is not a triangle number |
| Factorial (4!) of the number 4 | 24 |
Advertisement
4 in other bases
| Base 2 (Binary) | 100 |
| Base 3 (Ternary) | 11 |
| Base 4 (Quaternary) | 10 |
| Base 5 (Quinary) | 4 |
| Base 6 (Senary) | 4 |
| Base 8 (Octal) | 4 |
| Base 12 (Duodecimal) | 4 |
| Base 16 (Hexadecimal) | 4 |
| Base 20 (Vigesimal) | 4 |
Primes and factors tests for 4
| Is 4 a prime number? | 4 is not a prime number |
| Is 4 a perfect number? | 4 is not a perfect number |
| Is 4 a Mersenne prime? | 4 is not a Mersenne prime |
| Is 4 a Fermat prime? | 4 is not a Fermat prime |
| Is 4 a Fibonacci prime? | 4 is not a Fibonacci prime |
| Is 4 a partition prime? | 4 is not a partition prime |
| Is 4 a Pell prime? | 4 is not a Pell prime |
| Prime Factors | Prime factors of 4 |
4 in other numeral systems
| 4 in Roman numerals | IV |
| 4 in Chinese numerals | 肆 |
| 4 in Babylonian numerals |  |
| 4 in Egyptian numerals | 𓏽 |
Roots and squares for 4
| Is 4 a square number? | 4 is a square number |
| Is 4 a cube number? | 4 is not a cube number |
| Square root of 4 | 2 |
| Cube root of 4 | 1.5874010519682 |
Recreational math for 4
| Number 4 reversed | 4 |
| Sum of the digits | 4 |
| Number of digits | 1 |
Arithmetic tables for 4
Other pages about 4
Advertisement