The number 38831
38831 is a composite number with 8 divisors. Its prime factorisation is 13 × 29 × 103. Divisors (8): 1, 13, 29, 103, 377, 1339, 2987, 38831.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
38831 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
38831 is composite. Its prime factorisation is
- 3
The divisors add up to 43680; without 38831 itself that is 4849, so 38831 is deficient (4849 is less than 38831). Euler's totient φ(38831) = 34272 numbers up to 38831 share no factor with it.
- 4
The digits of 38831 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 168 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38831 = 13 \times 29 \times 103 \]
38831 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 43680 |
| Euler totient φ(n) | 34272 |
| Square | 1507846561 |
| Cube | 58551189810191 |
| Square root | 197.055830 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 168 |
| Scientific notation | 3.8831 × |
38831 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand eight hundred and thirty-one |
| Binary (base 2) | 1001011110101111 |
| Octal (base 8) | 113657 |
| Hexadecimal (base 16) | 97AF |
| Base 3 | 1222021012 |
| As time | 38831 seconds = 10 h 47 min 11 s |
Is 38831 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 1) | 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 | 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 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | 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 38831 a prime number?
No. 38831 = 13 × 29 × 103, so it is divisible by 13.
What are the factors of 38831?
1, 13, 29, 103, 377, 1339, 2987, 38831.
What is 38831 in binary?
1001011110101111 (hexadecimal 97AF, octal 113657).
What is the square root of 38831?
About 197.0558.
Is 38831 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 38831?
It is a composite number with 8 divisors.