The number 67490
67490 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 17 × 397. Divisors (16): 1, 2, 5, 10, 17, 34, 85, 170, 397, 794, 1985, 3970, 6749, 13498, 33745, 67490.
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How to work it out
- 1
67490 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
67490 is composite. Its prime factorisation is
- 3
The divisors add up to 128952; without 67490 itself that is 61462, so 67490 is deficient (61462 is less than 67490). Euler's totient φ(67490) = 25344 numbers up to 67490 share no factor with it.
- 4
The digits of 67490 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 60 steps to reach 1.
LaTeX source of the formulas on this page
\[ 67490 = 2 \times 5 \times 17 \times 397 \]
67490 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 128952 |
| Euler totient φ(n) | 25344 |
| Square | 4554900100 |
| Cube | 307410207749000 |
| Square root | 259.788375 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 60 |
| Scientific notation | 6.749 × |
67490 in other forms
| Form | Value |
|---|---|
| In words | sixty-seven thousand four hundred and ninety |
| Binary (base 2) | 10000011110100010 |
| Octal (base 8) | 203642 |
| Hexadecimal (base 16) | 107A2 |
| Base 3 | 10102120122 |
| As time | 67490 seconds = 18 h 44 min 50 s |
Is 67490 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (67490 ÷ 2 = 33745) | 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 (67490 ÷ 5 = 13498) | 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 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (67490 ÷ 10 = 6749) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | 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 67490 a prime number?
No. 67490 = 2 × 5 × 17 × 397, so it is divisible by 2.
What are the factors of 67490?
1, 2, 5, 10, 17, 34, 85, 170, 397, 794, 1985, 3970, 6749, 13498, 33745, 67490.
What is 67490 in binary?
10000011110100010 (hexadecimal 107A2, octal 203642).
What is the square root of 67490?
About 259.7884.
Is 67490 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 67490?
It is a composite number with 16 divisors.