The number 31448
31448 is a composite number with 8 divisors. Its prime factorisation is × 3931. Divisors (8): 1, 2, 4, 8, 3931, 7862, 15724, 31448.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
31448 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
31448 is composite. Its prime factorisation is
- 3
The divisors add up to 58980; without 31448 itself that is 27532, so 31448 is deficient (27532 is less than 31448). Euler's totient φ(31448) = 15720 numbers up to 31448 share no factor with it.
- 4
The digits of 31448 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 85 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31448 = 2^{3} \times 3931 \]31448 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 58980 |
| Euler totient φ(n) | 15720 |
| Square | 988976704 |
| Cube | 31101339387392 |
| Square root | 177.335840 (= 2√7862) |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 85 |
| Scientific notation | 3.1448 × |
31448 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand four hundred and forty-eight |
| Binary (base 2) | 111101011011000 |
| Octal (base 8) | 75330 |
| Hexadecimal (base 16) | 7AD8 |
| Base 3 | 1121010202 |
| As time | 31448 seconds = 8 h 44 min 8 s |
Is 31448 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (31448 ÷ 2 = 15724) | 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 | Yes (31448 ÷ 4 = 7862) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | 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 | Yes (31448 ÷ 8 = 3931) | 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 8) | 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 8) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31448 a prime number?
No. 31448 = × 3931, so it is divisible by 2.
What are the factors of 31448?
1, 2, 4, 8, 3931, 7862, 15724, 31448.
What is 31448 in binary?
111101011011000 (hexadecimal 7AD8, octal 75330).
What is the square root of 31448?
About 177.3358, exactly 2√7862.
Is 31448 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 31448?
It is a composite number with 8 divisors.