The number 38387
38387 is a composite number with 4 divisors. Its prime factorisation is 23 × 1669. Divisors (4): 1, 23, 1669, 38387.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38387: a semiprime: 23 × 1669, the product of two primes.
- 2
38387 is composite. Its prime factorisation is
- 3
The divisors add up to 40080; without 38387 itself that is 1693, so 38387 is deficient (1693 is less than 38387). Euler's totient φ(38387) = 36696 numbers up to 38387 share no factor with it.
- 4
The digits of 38387 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38387 = 23 \times 1669 \]
38387 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 40080 |
| Euler totient φ(n) | 36696 |
| Square | 1473561769 |
| Cube | 56565615626603 |
| Square root | 195.926006 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 75 |
| Scientific notation | 3.8387 × |
38387 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand three hundred and eighty-seven |
| Binary (base 2) | 1001010111110011 |
| Octal (base 8) | 112763 |
| Hexadecimal (base 16) | 95F3 |
| Base 3 | 1221122202 |
| As time | 38387 seconds = 10 h 39 min 47 s |
Is 38387 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 2) | 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 6) | 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 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 7) | 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 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38387 a prime number?
No. 38387 = 23 × 1669, so it is divisible by 23.
What are the factors of 38387?
1, 23, 1669, 38387.
What is 38387 in binary?
1001010111110011 (hexadecimal 95F3, octal 112763).
What is the square root of 38387?
About 195.9260.
Is 38387 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 38387?
38387 is a semiprime: 23 × 1669, the product of two primes.