The number 31426
31426 is a composite number with 8 divisors. Its prime factorisation is 2 × 19 × 827. Divisors (8): 1, 2, 19, 38, 827, 1654, 15713, 31426.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
31426 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
31426 is composite. Its prime factorisation is
- 3
The divisors add up to 49680; without 31426 itself that is 18254, so 31426 is deficient (18254 is less than 31426). Euler's totient φ(31426) = 14868 numbers up to 31426 share no factor with it.
- 4
The digits of 31426 add up to 16, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 85 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31426 = 2 \times 19 \times 827 \]
31426 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 49680 |
| Euler totient φ(n) | 14868 |
| Square | 987593476 |
| Cube | 31036112576776 |
| Square root | 177.273800 |
| Digit sum / digital root | 16 / 7 |
| Collatz steps to 1 | 85 |
| Scientific notation | 3.1426 × |
31426 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand four hundred and twenty-six |
| Binary (base 2) | 111101011000010 |
| Octal (base 8) | 75302 |
| Hexadecimal (base 16) | 7AC2 |
| Base 3 | 1121002221 |
| As time | 31426 seconds = 8 h 43 min 46 s |
Is 31426 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (31426 ÷ 2 = 15713) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 2) | 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 6) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31426 a prime number?
No. 31426 = 2 × 19 × 827, so it is divisible by 2.
What are the factors of 31426?
1, 2, 19, 38, 827, 1654, 15713, 31426.
What is 31426 in binary?
111101011000010 (hexadecimal 7AC2, octal 75302).
What is the square root of 31426?
About 177.2738.
Is 31426 divisible by 3?
No. Its digits add up to 16, which is not a multiple of 3.
What is special about the number 31426?
It is a composite number with 8 divisors.