The number 27949
27949 is a composite number with 4 divisors. Its prime factorisation is 19 × 1471. Divisors (4): 1, 19, 1471, 27949.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 27949: a semiprime: 19 × 1471, the product of two primes.
- 2
27949 is composite. Its prime factorisation is
- 3
The divisors add up to 29440; without 27949 itself that is 1491, so 27949 is deficient (1491 is less than 27949). Euler's totient φ(27949) = 26460 numbers up to 27949 share no factor with it.
- 4
The digits of 27949 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 152 steps to reach 1.
LaTeX source of the formulas on this page
\[ 27949 = 19 \times 1471 \]
27949 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 29440 |
| Euler totient φ(n) | 26460 |
| Square | 781146601 |
| Cube | 21832266351349 |
| Square root | 167.179544 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 152 |
| Scientific notation | 2.7949 × |
27949 in other forms
| Form | Value |
|---|---|
| In words | twenty-seven thousand nine hundred and forty-nine |
| Binary (base 2) | 110110100101101 |
| Octal (base 8) | 66455 |
| Hexadecimal (base 16) | 6D2D |
| Base 3 | 1102100011 |
| As time | 27949 seconds = 7 h 45 min 49 s |
Is 27949 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 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 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 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | 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 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 27949 a prime number?
No. 27949 = 19 × 1471, so it is divisible by 19.
What are the factors of 27949?
1, 19, 1471, 27949.
What is 27949 in binary?
110110100101101 (hexadecimal 6D2D, octal 66455).
What is the square root of 27949?
About 167.1795.
Is 27949 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 27949?
27949 is a semiprime: 19 × 1471, the product of two primes.