The number 28426
28426 is a composite number with 8 divisors. Its prime factorisation is 2 × 61 × 233. Divisors (8): 1, 2, 61, 122, 233, 466, 14213, 28426.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
28426 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
28426 is composite. Its prime factorisation is
- 3
The divisors add up to 43524; without 28426 itself that is 15098, so 28426 is deficient (15098 is less than 28426). Euler's totient φ(28426) = 13920 numbers up to 28426 share no factor with it.
- 4
The digits of 28426 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 59 steps to reach 1.
LaTeX source of the formulas on this page
\[ 28426 = 2 \times 61 \times 233 \]
28426 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 43524 |
| Euler totient φ(n) | 13920 |
| Square | 808037476 |
| Cube | 22969273292776 |
| Square root | 168.600119 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 59 |
| Scientific notation | 2.8426 × |
28426 in other forms
| Form | Value |
|---|---|
| In words | twenty-eight thousand four hundred and twenty-six |
| Binary (base 2) | 110111100001010 |
| Octal (base 8) | 67412 |
| Hexadecimal (base 16) | 6F0A |
| Base 3 | 1102222211 |
| As time | 28426 seconds = 7 h 53 min 46 s |
Is 28426 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (28426 ÷ 2 = 14213) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | 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 2) | 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 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 28426 a prime number?
No. 28426 = 2 × 61 × 233, so it is divisible by 2.
What are the factors of 28426?
1, 2, 61, 122, 233, 466, 14213, 28426.
What is 28426 in binary?
110111100001010 (hexadecimal 6F0A, octal 67412).
What is the square root of 28426?
About 168.6001.
Is 28426 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 28426?
It is a composite number with 8 divisors.