The number 40394
40394 is a composite number with 8 divisors. Its prime factorisation is 2 × 19 × 1063. Divisors (8): 1, 2, 19, 38, 1063, 2126, 20197, 40394.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40394 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40394 is composite. Its prime factorisation is
- 3
The divisors add up to 63840; without 40394 itself that is 23446, so 40394 is deficient (23446 is less than 40394). Euler's totient φ(40394) = 19116 numbers up to 40394 share no factor with it.
- 4
The digits of 40394 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
\[ 40394 = 2 \times 19 \times 1063 \]
40394 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 63840 |
| Euler totient φ(n) | 19116 |
| Square | 1631675236 |
| Cube | 65909889482984 |
| Square root | 200.982586 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 88 |
| Scientific notation | 4.0394 × |
40394 in other forms
| Form | Value |
|---|---|
| In words | forty thousand three hundred and ninety-four |
| Binary (base 2) | 1001110111001010 |
| Octal (base 8) | 116712 |
| Hexadecimal (base 16) | 9DCA |
| Base 3 | 2001102002 |
| As time | 40394 seconds = 11 h 13 min 14 s |
Is 40394 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (40394 ÷ 2 = 20197) | 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 2) | 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 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | 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 2) | 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 4) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 40394 a prime number?
No. 40394 = 2 × 19 × 1063, so it is divisible by 2.
What are the factors of 40394?
1, 2, 19, 38, 1063, 2126, 20197, 40394.
What is 40394 in binary?
1001110111001010 (hexadecimal 9DCA, octal 116712).
What is the square root of 40394?
About 200.9826.
Is 40394 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 40394?
It is a composite number with 8 divisors.