The number 38389
38389 is a composite number with 4 divisors. Its prime factorisation is 13 × 2953. Divisors (4): 1, 13, 2953, 38389.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38389: a semiprime: 13 × 2953, the product of two primes.
- 2
38389 is composite. Its prime factorisation is
- 3
The divisors add up to 41356; without 38389 itself that is 2967, so 38389 is deficient (2967 is less than 38389). Euler's totient φ(38389) = 35424 numbers up to 38389 share no factor with it.
- 4
The digits of 38389 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38389 = 13 \times 2953 \]
38389 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 41356 |
| Euler totient φ(n) | 35424 |
| Square | 1473715321 |
| Cube | 56574457457869 |
| Square root | 195.931110 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 75 |
| Scientific notation | 3.8389 × |
38389 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand three hundred and eighty-nine |
| Binary (base 2) | 1001010111110101 |
| Octal (base 8) | 112765 |
| Hexadecimal (base 16) | 95F5 |
| Base 3 | 1221122211 |
| As time | 38389 seconds = 10 h 39 min 49 s |
Is 38389 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | 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 4) | 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 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38389 a prime number?
No. 38389 = 13 × 2953, so it is divisible by 13.
What are the factors of 38389?
1, 13, 2953, 38389.
What is 38389 in binary?
1001010111110101 (hexadecimal 95F5, octal 112765).
What is the square root of 38389?
About 195.9311.
Is 38389 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 38389?
38389 is a semiprime: 13 × 2953, the product of two primes.