The number 24428
24428 is a composite number with 12 divisors. Its prime factorisation is × 31 × 197. Divisors (12): 1, 2, 4, 31, 62, 124, 197, 394, 788, 6107, 12214, 24428.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
24428 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
24428 is composite. Its prime factorisation is
- 3
The divisors add up to 44352; without 24428 itself that is 19924, so 24428 is deficient (19924 is less than 24428). Euler's totient φ(24428) = 11760 numbers up to 24428 share no factor with it.
- 4
The digits of 24428 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 157 steps to reach 1.
LaTeX source of the formulas on this page
\[ 24428 = 2^{2} \times 31 \times 197 \]24428 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 44352 |
| Euler totient φ(n) | 11760 |
| Square | 596727184 |
| Cube | 14576851650752 |
| Square root | 156.294594 (= 2√6107) |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 157 |
| Scientific notation | 2.4428 × |
24428 in other forms
| Form | Value |
|---|---|
| In words | twenty-four thousand four hundred and twenty-eight |
| Binary (base 2) | 101111101101100 |
| Octal (base 8) | 57554 |
| Hexadecimal (base 16) | 5F6C |
| Base 3 | 1020111202 |
| As time | 24428 seconds = 6 h 47 min 8 s |
Is 24428 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (24428 ÷ 2 = 12214) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | Yes (24428 ÷ 4 = 6107) | 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 2) | 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 4) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | 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 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 8) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 24428 a prime number?
No. 24428 = × 31 × 197, so it is divisible by 2.
What are the factors of 24428?
1, 2, 4, 31, 62, 124, 197, 394, 788, 6107, 12214, 24428.
What is 24428 in binary?
101111101101100 (hexadecimal 5F6C, octal 57554).
What is the square root of 24428?
About 156.2946, exactly 2√6107.
Is 24428 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 24428?
It is a composite number with 12 divisors.