The number 27478
27478 is a composite number with 8 divisors. Its prime factorisation is 2 × 11 × 1249. Divisors (8): 1, 2, 11, 22, 1249, 2498, 13739, 27478.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
27478 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
27478 is composite. Its prime factorisation is
- 3
The divisors add up to 45000; without 27478 itself that is 17522, so 27478 is deficient (17522 is less than 27478). Euler's totient φ(27478) = 12480 numbers up to 27478 share no factor with it.
- 4
The digits of 27478 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 196 steps to reach 1.
LaTeX source of the formulas on this page
\[ 27478 = 2 \times 11 \times 1249 \]
27478 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 45000 |
| Euler totient φ(n) | 12480 |
| Square | 755040484 |
| Cube | 20747002419352 |
| Square root | 165.764894 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 196 |
| Scientific notation | 2.7478 × |
27478 in other forms
| Form | Value |
|---|---|
| In words | twenty-seven thousand four hundred and seventy-eight |
| Binary (base 2) | 110101101010110 |
| Octal (base 8) | 65526 |
| Hexadecimal (base 16) | 6B56 |
| Base 3 | 1101200201 |
| As time | 27478 seconds = 7 h 37 min 58 s |
Is 27478 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (27478 ÷ 2 = 13739) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 1) | 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 | Yes (27478 ÷ 11 = 2498) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 27478 a prime number?
No. 27478 = 2 × 11 × 1249, so it is divisible by 2.
What are the factors of 27478?
1, 2, 11, 22, 1249, 2498, 13739, 27478.
What is 27478 in binary?
110101101010110 (hexadecimal 6B56, octal 65526).
What is the square root of 27478?
About 165.7649.
Is 27478 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 27478?
It is a composite number with 8 divisors.