The number 40369
40369 is a composite number with 8 divisors. Its prime factorisation is 7 × 73 × 79. Divisors (8): 1, 7, 73, 79, 511, 553, 5767, 40369.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40369 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40369 is composite. Its prime factorisation is
- 3
The divisors add up to 47360; without 40369 itself that is 6991, so 40369 is deficient (6991 is less than 40369). Euler's totient φ(40369) = 33696 numbers up to 40369 share no factor with it.
- 4
The digits of 40369 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 137 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40369 = 7 \times 73 \times 79 \]
40369 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 47360 |
| Euler totient φ(n) | 33696 |
| Square | 1629656161 |
| Cube | 65787589563409 |
| Square root | 200.920382 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 137 |
| Scientific notation | 4.0369 × |
40369 in other forms
| Form | Value |
|---|---|
| In words | forty thousand three hundred and sixty-nine |
| Binary (base 2) | 1001110110110001 |
| Octal (base 8) | 116661 |
| Hexadecimal (base 16) | 9DB1 |
| Base 3 | 2001101011 |
| As time | 40369 seconds = 11 h 12 min 49 s |
Is 40369 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 | No (remainder 4) | 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 | Yes (40369 ÷ 7 = 5767) | 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 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | 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 40369 a prime number?
No. 40369 = 7 × 73 × 79, so it is divisible by 7.
What are the factors of 40369?
1, 7, 73, 79, 511, 553, 5767, 40369.
What is 40369 in binary?
1001110110110001 (hexadecimal 9DB1, octal 116661).
What is the square root of 40369?
About 200.9204.
Is 40369 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 40369?
It is a composite number with 8 divisors.