The number 38155
38155 is a composite number with 8 divisors. Its prime factorisation is 5 × 13 × 587. Divisors (8): 1, 5, 13, 65, 587, 2935, 7631, 38155.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
38155 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
38155 is composite. Its prime factorisation is
- 3
The divisors add up to 49392; without 38155 itself that is 11237, so 38155 is deficient (11237 is less than 38155). Euler's totient φ(38155) = 28128 numbers up to 38155 share no factor with it.
- 4
The digits of 38155 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 54 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38155 = 5 \times 13 \times 587 \]
38155 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 49392 |
| Euler totient φ(n) | 28128 |
| Square | 1455804025 |
| Cube | 55546202573875 |
| Square root | 195.333049 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 54 |
| Scientific notation | 3.8155 × |
38155 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand one hundred and fifty-five |
| Binary (base 2) | 1001010100001011 |
| Octal (base 8) | 112413 |
| Hexadecimal (base 16) | 950B |
| Base 3 | 1221100011 |
| As time | 38155 seconds = 10 h 35 min 55 s |
Is 38155 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (38155 ÷ 5 = 7631) | 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 5) | 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 3) | 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 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38155 a prime number?
No. 38155 = 5 × 13 × 587, so it is divisible by 5.
What are the factors of 38155?
1, 5, 13, 65, 587, 2935, 7631, 38155.
What is 38155 in binary?
1001010100001011 (hexadecimal 950B, octal 112413).
What is the square root of 38155?
About 195.3330.
Is 38155 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 38155?
It is a composite number with 8 divisors.