The number 38407
38407 is a composite number with 4 divisors. Its prime factorisation is 193 × 199. Divisors (4): 1, 193, 199, 38407.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38407: a semiprime: 193 × 199, the product of two primes.
- 2
38407 is composite. Its prime factorisation is
- 3
The divisors add up to 38800; without 38407 itself that is 393, so 38407 is deficient (393 is less than 38407). Euler's totient φ(38407) = 38016 numbers up to 38407 share no factor with it.
- 4
The digits of 38407 add up to 22, 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
\[ 38407 = 193 \times 199 \]
38407 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 38800 |
| Euler totient φ(n) | 38016 |
| Square | 1475097649 |
| Cube | 56654075405143 |
| Square root | 195.977039 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 75 |
| Scientific notation | 3.8407 × |
38407 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand four hundred and seven |
| Binary (base 2) | 1001011000000111 |
| Octal (base 8) | 113007 |
| Hexadecimal (base 16) | 9607 |
| Base 3 | 1221200111 |
| As time | 38407 seconds = 10 h 40 min 7 s |
Is 38407 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 4) | 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 6) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38407 a prime number?
No. 38407 = 193 × 199, so it is divisible by 193.
What are the factors of 38407?
1, 193, 199, 38407.
What is 38407 in binary?
1001011000000111 (hexadecimal 9607, octal 113007).
What is the square root of 38407?
About 195.9770.
Is 38407 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 38407?
38407 is a semiprime: 193 × 199, the product of two primes.