The number 40047
40047 is a composite number with 8 divisors. Its prime factorisation is 3 × 7 × 1907. Divisors (8): 1, 3, 7, 21, 1907, 5721, 13349, 40047.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40047 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40047 is composite. Its prime factorisation is
- 3
The divisors add up to 61056; without 40047 itself that is 21009, so 40047 is deficient (21009 is less than 40047). Euler's totient φ(40047) = 22872 numbers up to 40047 share no factor with it.
- 4
The digits of 40047 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 168 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40047 = 3 \times 7 \times 1907 \]
40047 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 61056 |
| Euler totient φ(n) | 22872 |
| Square | 1603762209 |
| Cube | 64225865183823 |
| Square root | 200.117466 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 168 |
| Scientific notation | 4.0047 × |
40047 in other forms
| Form | Value |
|---|---|
| In words | forty thousand and forty-seven |
| Binary (base 2) | 1001110001101111 |
| Octal (base 8) | 116157 |
| Hexadecimal (base 16) | 9C6F |
| Base 3 | 2000221020 |
| As time | 40047 seconds = 11 h 7 min 27 s |
Is 40047 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 | Yes (40047 ÷ 3 = 13349) | 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 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 3) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (40047 ÷ 7 = 5721) | 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 6) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | 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 3) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 40047 a prime number?
No. 40047 = 3 × 7 × 1907, so it is divisible by 3.
What are the factors of 40047?
1, 3, 7, 21, 1907, 5721, 13349, 40047.
What is 40047 in binary?
1001110001101111 (hexadecimal 9C6F, octal 116157).
What is the square root of 40047?
About 200.1175.
Is 40047 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 40047?
It is a composite number with 8 divisors.