The number 40043
40043 is a composite number with 4 divisors. Its prime factorisation is 23 × 1741. Divisors (4): 1, 23, 1741, 40043.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 40043: a semiprime: 23 × 1741, the product of two primes.
- 2
40043 is composite. Its prime factorisation is
- 3
The divisors add up to 41808; without 40043 itself that is 1765, so 40043 is deficient (1765 is less than 40043). Euler's totient φ(40043) = 38280 numbers up to 40043 share no factor with it.
- 4
The digits of 40043 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 168 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40043 = 23 \times 1741 \]
40043 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 41808 |
| Euler totient φ(n) | 38280 |
| Square | 1603441849 |
| Cube | 64206621959507 |
| Square root | 200.107471 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 168 |
| Scientific notation | 4.0043 × |
40043 in other forms
| Form | Value |
|---|---|
| In words | forty thousand and forty-three |
| Binary (base 2) | 1001110001101011 |
| Octal (base 8) | 116153 |
| Hexadecimal (base 16) | 9C6B |
| Base 3 | 2000221002 |
| As time | 40043 seconds = 11 h 7 min 23 s |
Is 40043 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 3) | 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 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 3) | 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 | No (remainder 3) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | 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 40043 a prime number?
No. 40043 = 23 × 1741, so it is divisible by 23.
What are the factors of 40043?
1, 23, 1741, 40043.
What is 40043 in binary?
1001110001101011 (hexadecimal 9C6B, octal 116153).
What is the square root of 40043?
About 200.1075.
Is 40043 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 40043?
40043 is a semiprime: 23 × 1741, the product of two primes.