The number 27489
27489 is a composite number with 24 divisors. Its prime factorisation is 3 × × 11 × 17. Divisors (24): 1, 3, 7, 11, 17, 21, 33, 49, 51, 77, 119, 147, 187, 231, 357, 539 … 27489.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
27489 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
27489 is composite. Its prime factorisation is
- 3
The divisors add up to 49248; without 27489 itself that is 21759, so 27489 is deficient (21759 is less than 27489). Euler's totient φ(27489) = 13440 numbers up to 27489 share no factor with it.
- 4
The digits of 27489 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 139 steps to reach 1.
LaTeX source of the formulas on this page
\[ 27489 = 3 \times 7^{2} \times 11 \times 17 \]27489 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 24 |
| Sum of divisors | 49248 |
| Euler totient φ(n) | 13440 |
| Square | 755645121 |
| Cube | 20771928731169 |
| Square root | 165.798070 (= 7√561) |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 139 |
| Scientific notation | 2.7489 × |
27489 in other forms
| Form | Value |
|---|---|
| In words | twenty-seven thousand four hundred and eighty-nine |
| Binary (base 2) | 110101101100001 |
| Octal (base 8) | 65541 |
| Hexadecimal (base 16) | 6B61 |
| Base 3 | 1101201010 |
| As time | 27489 seconds = 7 h 38 min 9 s |
Is 27489 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 (27489 ÷ 3 = 9163) | 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 | Yes (27489 ÷ 7 = 3927) | 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 (27489 ÷ 11 = 2499) | 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 27489 a prime number?
No. 27489 = 3 × × 11 × 17, so it is divisible by 3.
What are the factors of 27489?
1, 3, 7, 11, 17, 21, 33, 49, 51, 77, 119, 147, 187, 231, 357, 539, 561, 833, 1309, 1617, 2499, 3927, 9163, 27489.
What is 27489 in binary?
110101101100001 (hexadecimal 6B61, octal 65541).
What is the square root of 27489?
About 165.7981, exactly 7√561.
Is 27489 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 27489?
It is a composite number with 24 divisors.