The number 43490
43490 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 4349. Divisors (8): 1, 2, 5, 10, 4349, 8698, 21745, 43490.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
43490 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
43490 is composite. Its prime factorisation is
- 3
The divisors add up to 78300; without 43490 itself that is 34810, so 43490 is deficient (34810 is less than 43490). Euler's totient φ(43490) = 17392 numbers up to 43490 share no factor with it.
- 4
The digits of 43490 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 70 steps to reach 1.
LaTeX source of the formulas on this page
\[ 43490 = 2 \times 5 \times 4349 \]
43490 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 78300 |
| Euler totient φ(n) | 17392 |
| Square | 1891380100 |
| Cube | 82256120549000 |
| Square root | 208.542562 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 70 |
| Scientific notation | 4.349 × |
43490 in other forms
| Form | Value |
|---|---|
| In words | forty-three thousand four hundred and ninety |
| Binary (base 2) | 1010100111100010 |
| Octal (base 8) | 124742 |
| Hexadecimal (base 16) | A9E2 |
| Base 3 | 2012122202 |
| As time | 43490 seconds = 12 h 4 min 50 s |
Is 43490 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (43490 ÷ 2 = 21745) | 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 (43490 ÷ 5 = 8698) | 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 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 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (43490 ÷ 10 = 4349) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | 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 43490 a prime number?
No. 43490 = 2 × 5 × 4349, so it is divisible by 2.
What are the factors of 43490?
1, 2, 5, 10, 4349, 8698, 21745, 43490.
What is 43490 in binary?
1010100111100010 (hexadecimal A9E2, octal 124742).
What is the square root of 43490?
About 208.5426.
Is 43490 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 43490?
It is a composite number with 8 divisors.