The number 72349
72349 is a composite number with 4 divisors. Its prime factorisation is 71 × 1019. Divisors (4): 1, 71, 1019, 72349.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 72349: a semiprime: 71 × 1019, the product of two primes.
- 2
72349 is composite. Its prime factorisation is
- 3
The divisors add up to 73440; without 72349 itself that is 1091, so 72349 is deficient (1091 is less than 72349). Euler's totient φ(72349) = 71260 numbers up to 72349 share no factor with it.
- 4
The digits of 72349 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 94 steps to reach 1.
LaTeX source of the formulas on this page
\[ 72349 = 71 \times 1019 \]
72349 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 73440 |
| Euler totient φ(n) | 71260 |
| Square | 5234377801 |
| Cube | 378701999524549 |
| Square root | 268.977694 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 94 |
| Scientific notation | 7.2349 × |
72349 in other forms
| Form | Value |
|---|---|
| In words | seventy-two thousand three hundred and forty-nine |
| Binary (base 2) | 10001101010011101 |
| Octal (base 8) | 215235 |
| Hexadecimal (base 16) | 11A9D |
| Base 3 | 10200020121 |
| As time | 72349 seconds = 20 h 5 min 49 s |
Is 72349 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 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | 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 7) | 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 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 72349 a prime number?
No. 72349 = 71 × 1019, so it is divisible by 71.
What are the factors of 72349?
1, 71, 1019, 72349.
What is 72349 in binary?
10001101010011101 (hexadecimal 11A9D, octal 215235).
What is the square root of 72349?
About 268.9777.
Is 72349 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 72349?
72349 is a semiprime: 71 × 1019, the product of two primes.