The number 47487
47487 is a composite number with 8 divisors. Its prime factorisation is 3 × 11 × 1439. Divisors (8): 1, 3, 11, 33, 1439, 4317, 15829, 47487.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
47487 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
47487 is composite. Its prime factorisation is
- 3
The divisors add up to 69120; without 47487 itself that is 21633, so 47487 is deficient (21633 is less than 47487). Euler's totient φ(47487) = 28760 numbers up to 47487 share no factor with it.
- 4
The digits of 47487 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 220 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47487 = 3 \times 11 \times 1439 \]
47487 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 69120 |
| Euler totient φ(n) | 28760 |
| Square | 2255015169 |
| Cube | 107083905330303 |
| Square root | 217.915121 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 220 |
| Scientific notation | 4.7487 × |
47487 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand four hundred and eighty-seven |
| Binary (base 2) | 1011100101111111 |
| Octal (base 8) | 134577 |
| Hexadecimal (base 16) | B97F |
| Base 3 | 2102010210 |
| As time | 47487 seconds = 13 h 11 min 27 s |
Is 47487 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 (47487 ÷ 3 = 15829) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | 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 6) | 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 7) | 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 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (47487 ÷ 11 = 4317) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 47487 a prime number?
No. 47487 = 3 × 11 × 1439, so it is divisible by 3.
What are the factors of 47487?
1, 3, 11, 33, 1439, 4317, 15829, 47487.
What is 47487 in binary?
1011100101111111 (hexadecimal B97F, octal 134577).
What is the square root of 47487?
About 217.9151.
Is 47487 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 47487?
It is a composite number with 8 divisors.