The number 27439
27439 is a composite number with 4 divisors. Its prime factorisation is 23 × 1193. Divisors (4): 1, 23, 1193, 27439.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 27439: a semiprime: 23 × 1193, the product of two primes.
- 2
27439 is composite. Its prime factorisation is
- 3
The divisors add up to 28656; without 27439 itself that is 1217, so 27439 is deficient (1217 is less than 27439). Euler's totient φ(27439) = 26224 numbers up to 27439 share no factor with it.
- 4
The digits of 27439 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
\[ 27439 = 23 \times 1193 \]
27439 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 28656 |
| Euler totient φ(n) | 26224 |
| Square | 752898721 |
| Cube | 20658788005519 |
| Square root | 165.647215 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 90 |
| Scientific notation | 2.7439 × |
27439 in other forms
| Form | Value |
|---|---|
| In words | twenty-seven thousand four hundred and thirty-nine |
| Binary (base 2) | 110101100101111 |
| Octal (base 8) | 65457 |
| Hexadecimal (base 16) | 6B2F |
| Base 3 | 1101122021 |
| As time | 27439 seconds = 7 h 37 min 19 s |
Is 27439 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 | 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 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 7) | 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 5) | 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 27439 a prime number?
No. 27439 = 23 × 1193, so it is divisible by 23.
What are the factors of 27439?
1, 23, 1193, 27439.
What is 27439 in binary?
110101100101111 (hexadecimal 6B2F, octal 65457).
What is the square root of 27439?
About 165.6472.
Is 27439 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 27439?
27439 is a semiprime: 23 × 1193, the product of two primes.