The number 40439
40439 is a composite number with 8 divisors. Its prime factorisation is 7 × 53 × 109. Divisors (8): 1, 7, 53, 109, 371, 763, 5777, 40439.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40439 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40439 is composite. Its prime factorisation is
- 3
The divisors add up to 47520; without 40439 itself that is 7081, so 40439 is deficient (7081 is less than 40439). Euler's totient φ(40439) = 33696 numbers up to 40439 share no factor with it.
- 4
The digits of 40439 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 88 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40439 = 7 \times 53 \times 109 \]
40439 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 47520 |
| Euler totient φ(n) | 33696 |
| Square | 1635312721 |
| Cube | 66130411124519 |
| Square root | 201.094505 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 88 |
| Scientific notation | 4.0439 × |
40439 in other forms
| Form | Value |
|---|---|
| In words | forty thousand four hundred and thirty-nine |
| Binary (base 2) | 1001110111110111 |
| Octal (base 8) | 116767 |
| Hexadecimal (base 16) | 9DF7 |
| Base 3 | 2001110202 |
| As time | 40439 seconds = 11 h 13 min 59 s |
Is 40439 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 4) | 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 | Yes (40439 ÷ 7 = 5777) | 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 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | 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 40439 a prime number?
No. 40439 = 7 × 53 × 109, so it is divisible by 7.
What are the factors of 40439?
1, 7, 53, 109, 371, 763, 5777, 40439.
What is 40439 in binary?
1001110111110111 (hexadecimal 9DF7, octal 116767).
What is the square root of 40439?
About 201.0945.
Is 40439 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 40439?
It is a composite number with 8 divisors.