The number 47318
47318 is a composite number with 8 divisors. Its prime factorisation is 2 × 59 × 401. Divisors (8): 1, 2, 59, 118, 401, 802, 23659, 47318.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 47318: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
47318 is composite. Its prime factorisation is
- 3
The divisors add up to 72360; without 47318 itself that is 25042, so 47318 is deficient (25042 is less than 47318). Euler's totient φ(47318) = 23200 numbers up to 47318 share no factor with it.
- 4
The digits of 47318 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 83 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47318 = 2 \times 59 \times 401 \]
47318 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 72360 |
| Euler totient φ(n) | 23200 |
| Square | 2238993124 |
| Cube | 105944676641432 |
| Square root | 217.527010 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 83 |
| Scientific notation | 4.7318 × |
47318 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand three hundred and eighteen |
| Binary (base 2) | 1011100011010110 |
| Octal (base 8) | 134326 |
| Hexadecimal (base 16) | B8D6 |
| Base 3 | 2101220112 |
| As time | 47318 seconds = 13 h 8 min 38 s |
Is 47318 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (47318 ÷ 2 = 23659) | 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 3) | 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 5) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | 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 47318 a prime number?
No. 47318 = 2 × 59 × 401, so it is divisible by 2.
What are the factors of 47318?
1, 2, 59, 118, 401, 802, 23659, 47318.
What is 47318 in binary?
1011100011010110 (hexadecimal B8D6, octal 134326).
What is the square root of 47318?
About 217.5270.
Is 47318 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 47318?
47318 is a happy number: repeatedly adding the squares of its digits reaches 1.