The number 24729
24729 is a composite number with 4 divisors. Its prime factorisation is 3 × 8243. Divisors (4): 1, 3, 8243, 24729.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 24729: a semiprime: 3 × 8243, the product of two primes.
- 2
24729 is composite. Its prime factorisation is
- 3
The divisors add up to 32976; without 24729 itself that is 8247, so 24729 is deficient (8247 is less than 24729). Euler's totient φ(24729) = 16484 numbers up to 24729 share no factor with it.
- 4
The digits of 24729 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 157 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24729 = 3 \times 8243 \]
24729 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 32976 |
| Euler totient φ(n) | 16484 |
| Square | 611523441 |
| Cube | 15122363172489 |
| Square root | 157.254571 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 157 |
| Scientific notation | 2.4729 × |
24729 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand seven hundred and twenty-nine |
| Binary (base 2) | 110000010011001 |
| Octal (base 8) | 60231 |
| Hexadecimal (base 16) | 6099 |
| Base 3 | 1020220220 |
| As time | 24729 seconds = 6 h 52 min 9 s |
Is 24729 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 (24729 ÷ 3 = 8243) | 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 | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 1) | 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 24729 a prime number?
No. 24729 = 3 × 8243, so it is divisible by 3.
What are the factors of 24729?
1, 3, 8243, 24729.
What is 24729 in binary?
110000010011001 (hexadecimal 6099, octal 60231).
What is the square root of 24729?
About 157.2546.
Is 24729 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 24729?
24729 is a semiprime: 3 × 8243, the product of two primes.