The number 67790
67790 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 6779. Divisors (8): 1, 2, 5, 10, 6779, 13558, 33895, 67790.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
67790 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
67790 is composite. Its prime factorisation is
- 3
The divisors add up to 122040; without 67790 itself that is 54250, so 67790 is deficient (54250 is less than 67790). Euler's totient φ(67790) = 27112 numbers up to 67790 share no factor with it.
- 4
The digits of 67790 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 112 steps to reach 1.
LaTeX source of the formulas on this page
\[ 67790 = 2 \times 5 \times 6779 \]
67790 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 122040 |
| Euler totient φ(n) | 27112 |
| Square | 4595484100 |
| Cube | 311527867139000 |
| Square root | 260.365128 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 112 |
| Scientific notation | 6.779 × |
67790 in other forms
| Form | Value |
|---|---|
| In words | sixty-seven thousand seven hundred and ninety |
| Binary (base 2) | 10000100011001110 |
| Octal (base 8) | 204316 |
| Hexadecimal (base 16) | 108CE |
| Base 3 | 10102222202 |
| As time | 67790 seconds = 18 h 49 min 50 s |
Is 67790 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (67790 ÷ 2 = 33895) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (67790 ÷ 5 = 13558) | 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 2) | 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 6) | 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 | Yes (67790 ÷ 10 = 6779) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 67790 a prime number?
No. 67790 = 2 × 5 × 6779, so it is divisible by 2.
What are the factors of 67790?
1, 2, 5, 10, 6779, 13558, 33895, 67790.
What is 67790 in binary?
10000100011001110 (hexadecimal 108CE, octal 204316).
What is the square root of 67790?
About 260.3651.
Is 67790 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 67790?
It is a composite number with 8 divisors.