The number 40115
40115 is a composite number with 8 divisors. Its prime factorisation is 5 × 71 × 113. Divisors (8): 1, 5, 71, 113, 355, 565, 8023, 40115.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40115 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40115 is composite. Its prime factorisation is
- 3
The divisors add up to 49248; without 40115 itself that is 9133, so 40115 is deficient (9133 is less than 40115). Euler's totient φ(40115) = 31360 numbers up to 40115 share no factor with it.
- 4
The digits of 40115 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 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40115 = 5 \times 71 \times 113 \]
40115 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 49248 |
| Euler totient φ(n) | 31360 |
| Square | 1609213225 |
| Cube | 64553588520875 |
| Square root | 200.287294 |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.0115 × |
40115 in other forms
| Form | Value |
|---|---|
| In words | forty thousand one hundred and fifteen |
| Binary (base 2) | 1001110010110011 |
| Octal (base 8) | 116263 |
| Hexadecimal (base 16) | 9CB3 |
| Base 3 | 2001000202 |
| As time | 40115 seconds = 11 h 8 min 35 s |
Is 40115 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 (40115 ÷ 5 = 8023) | 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 5) | 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 5) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | 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 40115 a prime number?
No. 40115 = 5 × 71 × 113, so it is divisible by 5.
What are the factors of 40115?
1, 5, 71, 113, 355, 565, 8023, 40115.
What is 40115 in binary?
1001110010110011 (hexadecimal 9CB3, octal 116263).
What is the square root of 40115?
About 200.2873.
Is 40115 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 40115?
It is a composite number with 8 divisors.