The number 494
494 is a palindrome: it reads 494 backwards too. Its prime factorisation is 2 × 13 × 19. Divisors (8): 1, 2, 13, 19, 26, 38, 247, 494.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 494: a palindrome: it reads 494 backwards too.
- 2
494 is composite. Its prime factorisation is
- 3
The divisors add up to 840; without 494 itself that is 346, so 494 is deficient (346 is less than 494). Euler's totient φ(494) = 216 numbers up to 494 share no factor with it.
- 4
The digits of 494 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 48 steps to reach 1.
LaTeX source of the formulas on this page
\[ 494 = 2 \times 13 \times 19 \]
494 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 840 |
| Euler totient φ(n) | 216 |
| Square | 244036 |
| Cube | 120553784 |
| Square root | 22.226111 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 48 |
| Scientific notation | 4.94 × |
494 in other forms
| Form | Value |
|---|---|
| In words | four hundred and ninety-four |
| Roman numerals | CDXCIV |
| Binary (base 2) | 111101110 |
| Octal (base 8) | 756 |
| Hexadecimal (base 16) | 1EE |
| Base 3 | 200022 |
| As time | 494 seconds = 8 min 14 s |
Is 494 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (494 ÷ 2 = 247) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 4) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 494 a prime number?
No. 494 = 2 × 13 × 19, so it is divisible by 2.
What are the factors of 494?
1, 2, 13, 19, 26, 38, 247, 494.
What is 494 in binary?
111101110 (hexadecimal 1EE, octal 756).
What is the square root of 494?
About 22.2261.
What is 494 in Roman numerals?
CDXCIV.
Is 494 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 494?
494 is a palindrome: it reads 494 backwards too.