The number 38309
38309 is a composite number with 4 divisors. Its prime factorisation is 29 × 1321. Divisors (4): 1, 29, 1321, 38309.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38309: a semiprime: 29 × 1321, the product of two primes.
- 2
38309 is composite. Its prime factorisation is
- 3
The divisors add up to 39660; without 38309 itself that is 1351, so 38309 is deficient (1351 is less than 38309). Euler's totient φ(38309) = 36960 numbers up to 38309 share no factor with it.
- 4
The digits of 38309 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 155 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38309 = 29 \times 1321 \]
38309 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 39660 |
| Euler totient φ(n) | 36960 |
| Square | 1467579481 |
| Cube | 56221502337629 |
| Square root | 195.726850 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 155 |
| Scientific notation | 3.8309 × |
38309 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand three hundred and nine |
| Binary (base 2) | 1001010110100101 |
| Octal (base 8) | 112645 |
| Hexadecimal (base 16) | 95A5 |
| Base 3 | 1221112212 |
| As time | 38309 seconds = 10 h 38 min 29 s |
Is 38309 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 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 5) | 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 5) | 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 9) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38309 a prime number?
No. 38309 = 29 × 1321, so it is divisible by 29.
What are the factors of 38309?
1, 29, 1321, 38309.
What is 38309 in binary?
1001010110100101 (hexadecimal 95A5, octal 112645).
What is the square root of 38309?
About 195.7269.
Is 38309 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 38309?
38309 is a semiprime: 29 × 1321, the product of two primes.