The number 40055
40055 is a composite number with 4 divisors. Its prime factorisation is 5 × 8011. Divisors (4): 1, 5, 8011, 40055.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 40055: a semiprime: 5 × 8011, the product of two primes.
- 2
40055 is composite. Its prime factorisation is
- 3
The divisors add up to 48072; without 40055 itself that is 8017, so 40055 is deficient (8017 is less than 40055). Euler's totient φ(40055) = 32040 numbers up to 40055 share no factor with it.
- 4
The digits of 40055 add up to 14, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 67 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40055 = 5 \times 8011 \]
40055 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 48072 |
| Euler totient φ(n) | 32040 |
| Square | 1604403025 |
| Cube | 64264363166375 |
| Square root | 200.137453 |
| Digit sum / digital root | 14 / 5 |
| Collatz steps to 1 | 67 |
| Scientific notation | 4.0055 × |
40055 in other forms
| Form | Value |
|---|---|
| In words | forty thousand and fifty-five |
| Binary (base 2) | 1001110001110111 |
| Octal (base 8) | 116167 |
| Hexadecimal (base 16) | 9C77 |
| Base 3 | 2000221112 |
| As time | 40055 seconds = 11 h 7 min 35 s |
Is 40055 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 | Yes (40055 ÷ 5 = 8011) | 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 5) | 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 40055 a prime number?
No. 40055 = 5 × 8011, so it is divisible by 5.
What are the factors of 40055?
1, 5, 8011, 40055.
What is 40055 in binary?
1001110001110111 (hexadecimal 9C77, octal 116167).
What is the square root of 40055?
About 200.1375.
Is 40055 divisible by 3?
No. Its digits add up to 14, which is not a multiple of 3.
What is special about the number 40055?
40055 is a semiprime: 5 × 8011, the product of two primes.