The number 27655
27655 is a composite number with 4 divisors. Its prime factorisation is 5 × 5531. Divisors (4): 1, 5, 5531, 27655.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 27655: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 5 × 5531, the product of two primes.
- 2
27655 is composite. Its prime factorisation is
- 3
The divisors add up to 33192; without 27655 itself that is 5537, so 27655 is deficient (5537 is less than 27655). Euler's totient φ(27655) = 22120 numbers up to 27655 share no factor with it.
- 4
The digits of 27655 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 90 steps to reach 1.
LaTeX source of the formulas on this page
\[ 27655 = 5 \times 5531 \]
27655 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 33192 |
| Euler totient φ(n) | 22120 |
| Square | 764799025 |
| Cube | 21150517036375 |
| Square root | 166.297925 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 90 |
| Scientific notation | 2.7655 × |
27655 in other forms
| Form | Value |
|---|---|
| In words | twenty-seven thousand six hundred and fifty-five |
| Binary (base 2) | 110110000000111 |
| Octal (base 8) | 66007 |
| Hexadecimal (base 16) | 6C07 |
| Base 3 | 1101221021 |
| As time | 27655 seconds = 7 h 40 min 55 s |
Is 27655 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 | No (remainder 1) | 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 | Yes (27655 ÷ 5 = 5531) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 27655 a prime number?
No. 27655 = 5 × 5531, so it is divisible by 5.
What are the factors of 27655?
1, 5, 5531, 27655.
What is 27655 in binary?
110110000000111 (hexadecimal 6C07, octal 66007).
What is the square root of 27655?
About 166.2979.
Is 27655 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 27655?
27655 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 5 × 5531, the product of two primes.