The number 40585
40585 is a composite number with 4 divisors. Its prime factorisation is 5 × 8117. Divisors (4): 1, 5, 8117, 40585.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 40585: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 5 × 8117, the product of two primes.
- 2
40585 is composite. Its prime factorisation is
- 3
The divisors add up to 48708; without 40585 itself that is 8123, so 40585 is deficient (8123 is less than 40585). Euler's totient φ(40585) = 32464 numbers up to 40585 share no factor with it.
- 4
The digits of 40585 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 168 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40585 = 5 \times 8117 \]
40585 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 48708 |
| Euler totient φ(n) | 32464 |
| Square | 1647142225 |
| Cube | 66849267201625 |
| Square root | 201.457191 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 168 |
| Scientific notation | 4.0585 × |
40585 in other forms
| Form | Value |
|---|---|
| In words | forty thousand five hundred and eighty-five |
| Binary (base 2) | 1001111010001001 |
| Octal (base 8) | 117211 |
| Hexadecimal (base 16) | 9E89 |
| Base 3 | 2001200011 |
| As time | 40585 seconds = 11 h 16 min 25 s |
Is 40585 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 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (40585 ÷ 5 = 8117) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 40585 a prime number?
No. 40585 = 5 × 8117, so it is divisible by 5.
What are the factors of 40585?
1, 5, 8117, 40585.
What is 40585 in binary?
1001111010001001 (hexadecimal 9E89, octal 117211).
What is the square root of 40585?
About 201.4572.
Is 40585 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 40585?
40585 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 5 × 8117, the product of two primes.