The number 38949
38949 is a composite number with 4 divisors. Its prime factorisation is 3 × 12983. Divisors (4): 1, 3, 12983, 38949.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38949: a semiprime: 3 × 12983, the product of two primes.
- 2
38949 is composite. Its prime factorisation is
- 3
The divisors add up to 51936; without 38949 itself that is 12987, so 38949 is deficient (12987 is less than 38949). Euler's totient φ(38949) = 25964 numbers up to 38949 share no factor with it.
- 4
The digits of 38949 add up to 33, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 168 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38949 = 3 \times 12983 \]
38949 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 51936 |
| Euler totient φ(n) | 25964 |
| Square | 1517024601 |
| Cube | 59086591184349 |
| Square root | 197.355010 |
| Digit sum / digital root | 33 / 6 |
| Collatz steps to 1 | 168 |
| Scientific notation | 3.8949 × |
38949 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand nine hundred and forty-nine |
| Binary (base 2) | 1001100000100101 |
| Octal (base 8) | 114045 |
| Hexadecimal (base 16) | 9825 |
| Base 3 | 1222102120 |
| As time | 38949 seconds = 10 h 49 min 9 s |
Is 38949 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 | Yes (38949 ÷ 3 = 12983) | 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 3) | 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 6) | 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 9) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38949 a prime number?
No. 38949 = 3 × 12983, so it is divisible by 3.
What are the factors of 38949?
1, 3, 12983, 38949.
What is 38949 in binary?
1001100000100101 (hexadecimal 9825, octal 114045).
What is the square root of 38949?
About 197.3550.
Is 38949 divisible by 3?
Yes. Its digits add up to 33, a multiple of 3.
What is special about the number 38949?
38949 is a semiprime: 3 × 12983, the product of two primes.