The number 38438
38438 is a composite number with 4 divisors. Its prime factorisation is 2 × 19219. Divisors (4): 1, 2, 19219, 38438.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38438: a semiprime: 2 × 19219, the product of two primes.
- 2
38438 is composite. Its prime factorisation is
- 3
The divisors add up to 57660; without 38438 itself that is 19222, so 38438 is deficient (19222 is less than 38438). Euler's totient φ(38438) = 19218 numbers up to 38438 share no factor with it.
- 4
The digits of 38438 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38438 = 2 \times 19219 \]
38438 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 57660 |
| Euler totient φ(n) | 19218 |
| Square | 1477479844 |
| Cube | 56791370243672 |
| Square root | 196.056114 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 75 |
| Scientific notation | 3.8438 × |
38438 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand four hundred and thirty-eight |
| Binary (base 2) | 1001011000100110 |
| Octal (base 8) | 113046 |
| Hexadecimal (base 16) | 9626 |
| Base 3 | 1221201122 |
| As time | 38438 seconds = 10 h 40 min 38 s |
Is 38438 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (38438 ÷ 2 = 19219) | 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 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | 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 4) | 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 38438 a prime number?
No. 38438 = 2 × 19219, so it is divisible by 2.
What are the factors of 38438?
1, 2, 19219, 38438.
What is 38438 in binary?
1001011000100110 (hexadecimal 9626, octal 113046).
What is the square root of 38438?
About 196.0561.
Is 38438 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 38438?
38438 is a semiprime: 2 × 19219, the product of two primes.