The number 28325
28325 is a composite number with 12 divisors. Its prime factorisation is × 11 × 103. Divisors (12): 1, 5, 11, 25, 55, 103, 275, 515, 1133, 2575, 5665, 28325.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
28325 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
28325 is composite. Its prime factorisation is
- 3
The divisors add up to 38688; without 28325 itself that is 10363, so 28325 is deficient (10363 is less than 28325). Euler's totient φ(28325) = 20400 numbers up to 28325 share no factor with it.
- 4
The digits of 28325 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 103 steps to reach 1.
LaTeX source of the formulas on this page
\[ 28325 = 5^{2} \times 11 \times 103 \]28325 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 38688 |
| Euler totient φ(n) | 20400 |
| Square | 802305625 |
| Cube | 22725306828125 |
| Square root | 168.300327 (= 5√1133) |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 103 |
| Scientific notation | 2.8325 × |
28325 in other forms
| Form | Value |
|---|---|
| In words | twenty-eight thousand three hundred and twenty-five |
| Binary (base 2) | 110111010100101 |
| Octal (base 8) | 67245 |
| Hexadecimal (base 16) | 6EA5 |
| Base 3 | 1102212002 |
| As time | 28325 seconds = 7 h 52 min 5 s |
Is 28325 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 2) | 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 | Yes (28325 ÷ 5 = 5665) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 2) | 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 | Yes (28325 ÷ 11 = 2575) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 28325 a prime number?
No. 28325 = × 11 × 103, so it is divisible by 5.
What are the factors of 28325?
1, 5, 11, 25, 55, 103, 275, 515, 1133, 2575, 5665, 28325.
What is 28325 in binary?
110111010100101 (hexadecimal 6EA5, octal 67245).
What is the square root of 28325?
About 168.3003, exactly 5√1133.
Is 28325 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 28325?
It is a composite number with 12 divisors.