The number 47289
47289 is a composite number with 8 divisors. Its prime factorisation is 3 × 11 × 1433. Divisors (8): 1, 3, 11, 33, 1433, 4299, 15763, 47289.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
47289 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
47289 is composite. Its prime factorisation is
- 3
The divisors add up to 68832; without 47289 itself that is 21543, so 47289 is deficient (21543 is less than 47289). Euler's totient φ(47289) = 28640 numbers up to 47289 share no factor with it.
- 4
The digits of 47289 add up to 30, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 176 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47289 = 3 \times 11 \times 1433 \]
47289 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 68832 |
| Euler totient φ(n) | 28640 |
| Square | 2236249521 |
| Cube | 105750003598569 |
| Square root | 217.460341 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 176 |
| Scientific notation | 4.7289 × |
47289 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand two hundred and eighty-nine |
| Binary (base 2) | 1011100010111001 |
| Octal (base 8) | 134271 |
| Hexadecimal (base 16) | B8B9 |
| Base 3 | 2101212110 |
| As time | 47289 seconds = 13 h 8 min 9 s |
Is 47289 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (47289 ÷ 3 = 15763) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | 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 3) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (47289 ÷ 11 = 4299) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47289 a prime number?
No. 47289 = 3 × 11 × 1433, so it is divisible by 3.
What are the factors of 47289?
1, 3, 11, 33, 1433, 4299, 15763, 47289.
What is 47289 in binary?
1011100010111001 (hexadecimal B8B9, octal 134271).
What is the square root of 47289?
About 217.4603.
Is 47289 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 47289?
It is a composite number with 8 divisors.