The number 40049
40049 is a composite number with 4 divisors. Its prime factorisation is 29 × 1381. Divisors (4): 1, 29, 1381, 40049.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 40049: a semiprime: 29 × 1381, the product of two primes.
- 2
40049 is composite. Its prime factorisation is
- 3
The divisors add up to 41460; without 40049 itself that is 1411, so 40049 is deficient (1411 is less than 40049). Euler's totient φ(40049) = 38640 numbers up to 40049 share no factor with it.
- 4
The digits of 40049 add up to 17, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 31 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40049 = 29 \times 1381 \]
40049 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 41460 |
| Euler totient φ(n) | 38640 |
| Square | 1603922401 |
| Cube | 64235488237649 |
| Square root | 200.122463 |
| Digit sum / digital root | 17 / 8 |
| Collatz steps to 1 | 31 |
| Scientific notation | 4.0049 × |
40049 in other forms
| Form | Value |
|---|---|
| In words | forty thousand and forty-nine |
| Binary (base 2) | 1001110001110001 |
| Octal (base 8) | 116161 |
| Hexadecimal (base 16) | 9C71 |
| Base 3 | 2000221022 |
| As time | 40049 seconds = 11 h 7 min 29 s |
Is 40049 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 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 5) | 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 1) | 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 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 40049 a prime number?
No. 40049 = 29 × 1381, so it is divisible by 29.
What are the factors of 40049?
1, 29, 1381, 40049.
What is 40049 in binary?
1001110001110001 (hexadecimal 9C71, octal 116161).
What is the square root of 40049?
About 200.1225.
Is 40049 divisible by 3?
No. Its digits add up to 17, which is not a multiple of 3.
What is special about the number 40049?
40049 is a semiprime: 29 × 1381, the product of two primes.