The number 28967
28967 is a composite number with 4 divisors. Its prime factorisation is 83 × 349. Divisors (4): 1, 83, 349, 28967.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 28967: a semiprime: 83 × 349, the product of two primes.
- 2
28967 is composite. Its prime factorisation is
- 3
The divisors add up to 29400; without 28967 itself that is 433, so 28967 is deficient (433 is less than 28967). Euler's totient φ(28967) = 28536 numbers up to 28967 share no factor with it.
- 4
The digits of 28967 add up to 32, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 103 steps to reach 1.
LaTeX source of the formulas on this page
\[ 28967 = 83 \times 349 \]
28967 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 29400 |
| Euler totient φ(n) | 28536 |
| Square | 839087089 |
| Cube | 24305835707063 |
| Square root | 170.196945 |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 103 |
| Scientific notation | 2.8967 × |
28967 in other forms
| Form | Value |
|---|---|
| In words | twenty-eight thousand nine hundred and sixty-seven |
| Binary (base 2) | 111000100100111 |
| Octal (base 8) | 70447 |
| Hexadecimal (base 16) | 7127 |
| Base 3 | 1110201212 |
| As time | 28967 seconds = 8 h 2 min 47 s |
Is 28967 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 2) | 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 1) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 28967 a prime number?
No. 28967 = 83 × 349, so it is divisible by 83.
What are the factors of 28967?
1, 83, 349, 28967.
What is 28967 in binary?
111000100100111 (hexadecimal 7127, octal 70447).
What is the square root of 28967?
About 170.1969.
Is 28967 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 28967?
28967 is a semiprime: 83 × 349, the product of two primes.