The number 38399
38399 is a composite number with 8 divisors. Its prime factorisation is 19 × 43 × 47. Divisors (8): 1, 19, 43, 47, 817, 893, 2021, 38399.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
38399 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
38399 is composite. Its prime factorisation is
- 3
The divisors add up to 42240; without 38399 itself that is 3841, so 38399 is deficient (3841 is less than 38399). Euler's totient φ(38399) = 34776 numbers up to 38399 share no factor with it.
- 4
The digits of 38399 add up to 32, 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
\[ 38399 = 19 \times 43 \times 47 \]
38399 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 42240 |
| Euler totient φ(n) | 34776 |
| Square | 1474483201 |
| Cube | 56618680435199 |
| Square root | 195.956628 |
| Digit sum / digital root | 32 / 5 |
| Collatz steps to 1 | 168 |
| Scientific notation | 3.8399 × |
38399 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand three hundred and ninety-nine |
| Binary (base 2) | 1001010111111111 |
| Octal (base 8) | 112777 |
| Hexadecimal (base 16) | 95FF |
| Base 3 | 1221200012 |
| As time | 38399 seconds = 10 h 39 min 59 s |
Is 38399 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 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 4) | 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 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | 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 38399 a prime number?
No. 38399 = 19 × 43 × 47, so it is divisible by 19.
What are the factors of 38399?
1, 19, 43, 47, 817, 893, 2021, 38399.
What is 38399 in binary?
1001010111111111 (hexadecimal 95FF, octal 112777).
What is the square root of 38399?
About 195.9566.
Is 38399 divisible by 3?
No. Its digits add up to 32, which is not a multiple of 3.
What is special about the number 38399?
It is a composite number with 8 divisors.