The number 40378
40378 is a composite number with 8 divisors. Its prime factorisation is 2 × 13 × 1553. Divisors (8): 1, 2, 13, 26, 1553, 3106, 20189, 40378.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
40378 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
40378 is composite. Its prime factorisation is
- 3
The divisors add up to 65268; without 40378 itself that is 24890, so 40378 is deficient (24890 is less than 40378). Euler's totient φ(40378) = 18624 numbers up to 40378 share no factor with it.
- 4
The digits of 40378 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
\[ 40378 = 2 \times 13 \times 1553 \]
40378 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 65268 |
| Euler totient φ(n) | 18624 |
| Square | 1630382884 |
| Cube | 65831600090152 |
| Square root | 200.942778 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 137 |
| Scientific notation | 4.0378 × |
40378 in other forms
| Form | Value |
|---|---|
| In words | forty thousand three hundred and seventy-eight |
| Binary (base 2) | 1001110110111010 |
| Octal (base 8) | 116672 |
| Hexadecimal (base 16) | 9DBA |
| Base 3 | 2001101111 |
| As time | 40378 seconds = 11 h 12 min 58 s |
Is 40378 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (40378 ÷ 2 = 20189) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 40378 a prime number?
No. 40378 = 2 × 13 × 1553, so it is divisible by 2.
What are the factors of 40378?
1, 2, 13, 26, 1553, 3106, 20189, 40378.
What is 40378 in binary?
1001110110111010 (hexadecimal 9DBA, octal 116672).
What is the square root of 40378?
About 200.9428.
Is 40378 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 40378?
It is a composite number with 8 divisors.