The number 326
326 is a composite number with 4 divisors. Its prime factorisation is 2 × 163. Divisors (4): 1, 2, 163, 326.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 326: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 163, the product of two primes.
- 2
326 is composite. Its prime factorisation is
- 3
The divisors add up to 492; without 326 itself that is 166, so 326 is deficient (166 is less than 326). Euler's totient φ(326) = 162 numbers up to 326 share no factor with it.
- 4
The digits of 326 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 24 steps to reach 1.
LaTeX source of the formulas on this page
\[ 326 = 2 \times 163 \]
326 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 492 |
| Euler totient φ(n) | 162 |
| Square | 106276 |
| Cube | 34645976 |
| Square root | 18.055470 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 24 |
| Scientific notation | 3.26 × |
326 in other forms
| Form | Value |
|---|---|
| In words | three hundred and twenty-six |
| Roman numerals | CCCXXVI |
| Binary (base 2) | 101000110 |
| Octal (base 8) | 506 |
| Hexadecimal (base 16) | 146 |
| Base 3 | 110002 |
| As time | 326 seconds = 5 min 26 s |
Is 326 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (326 ÷ 2 = 163) | 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 1) | 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 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | 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 326 a prime number?
No. 326 = 2 × 163, so it is divisible by 2.
What are the factors of 326?
1, 2, 163, 326.
What is 326 in binary?
101000110 (hexadecimal 146, octal 506).
What is the square root of 326?
About 18.0555.
What is 326 in Roman numerals?
CCCXXVI.
Is 326 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 326?
326 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 163, the product of two primes.