The number 40349
40349 is a composite number with 4 divisors. Its prime factorisation is 157 × 257. Divisors (4): 1, 157, 257, 40349.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 40349: a semiprime: 157 × 257, the product of two primes.
- 2
40349 is composite. Its prime factorisation is
- 3
The divisors add up to 40764; without 40349 itself that is 415, so 40349 is deficient (415 is less than 40349). Euler's totient φ(40349) = 39936 numbers up to 40349 share no factor with it.
- 4
The digits of 40349 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 225 steps to reach 1.
LaTeX source of the formulas on this page
\[ 40349 = 157 \times 257 \]
40349 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 40764 |
| Euler totient φ(n) | 39936 |
| Square | 1628041801 |
| Cube | 65689858628549 |
| Square root | 200.870605 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 225 |
| Scientific notation | 4.0349 × |
40349 in other forms
| Form | Value |
|---|---|
| In words | forty thousand three hundred and forty-nine |
| Binary (base 2) | 1001110110011101 |
| Octal (base 8) | 116635 |
| Hexadecimal (base 16) | 9D9D |
| Base 3 | 2001100102 |
| As time | 40349 seconds = 11 h 12 min 29 s |
Is 40349 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 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 2) | 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 1) | 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 40349 a prime number?
No. 40349 = 157 × 257, so it is divisible by 157.
What are the factors of 40349?
1, 157, 257, 40349.
What is 40349 in binary?
1001110110011101 (hexadecimal 9D9D, octal 116635).
What is the square root of 40349?
About 200.8706.
Is 40349 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 40349?
40349 is a semiprime: 157 × 257, the product of two primes.