The number 38138
38138 is a composite number with 4 divisors. Its prime factorisation is 2 × 19069. Divisors (4): 1, 2, 19069, 38138.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38138: a semiprime: 2 × 19069, the product of two primes.
- 2
38138 is composite. Its prime factorisation is
- 3
The divisors add up to 57210; without 38138 itself that is 19072, so 38138 is deficient (19072 is less than 38138). Euler's totient φ(38138) = 19068 numbers up to 38138 share no factor with it.
- 4
The digits of 38138 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 106 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38138 = 2 \times 19069 \]
38138 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 57210 |
| Euler totient φ(n) | 19068 |
| Square | 1454507044 |
| Cube | 55471989644072 |
| Square root | 195.289529 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 106 |
| Scientific notation | 3.8138 × |
38138 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand one hundred and thirty-eight |
| Binary (base 2) | 1001010011111010 |
| Octal (base 8) | 112372 |
| Hexadecimal (base 16) | 94FA |
| Base 3 | 1221022112 |
| As time | 38138 seconds = 10 h 35 min 38 s |
Is 38138 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (38138 ÷ 2 = 19069) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | 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 2) | 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 8) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38138 a prime number?
No. 38138 = 2 × 19069, so it is divisible by 2.
What are the factors of 38138?
1, 2, 19069, 38138.
What is 38138 in binary?
1001010011111010 (hexadecimal 94FA, octal 112372).
What is the square root of 38138?
About 195.2895.
Is 38138 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 38138?
38138 is a semiprime: 2 × 19069, the product of two primes.