The number 31038
31038 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 7 × 739. Divisors (16): 1, 2, 3, 6, 7, 14, 21, 42, 739, 1478, 2217, 4434, 5173, 10346, 15519, 31038.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
31038 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
31038 is composite. Its prime factorisation is
- 3
The divisors add up to 71040; without 31038 itself that is 40002, so 31038 is abundant (40002 is more than 31038). Euler's totient φ(31038) = 8856 numbers up to 31038 share no factor with it.
- 4
The digits of 31038 add up to 15, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 121 steps to reach 1.
LaTeX source of the formulas on this page
\[ 31038 = 2 \times 3 \times 7 \times 739 \]
31038 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 71040 |
| Euler totient φ(n) | 8856 |
| Square | 963357444 |
| Cube | 29900688346872 |
| Square root | 176.176048 |
| Digit sum / digital root | 15 / 6 |
| Collatz steps to 1 | 121 |
| Scientific notation | 3.1038 × |
31038 in other forms
| Form | Value |
|---|---|
| In words | thirty-one thousand and thirty-eight |
| Binary (base 2) | 111100100111110 |
| Octal (base 8) | 74476 |
| Hexadecimal (base 16) | 793E |
| Base 3 | 1120120120 |
| As time | 31038 seconds = 8 h 37 min 18 s |
Is 31038 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (31038 ÷ 2 = 15519) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (31038 ÷ 3 = 10346) | 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 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | Yes (31038 ÷ 6 = 5173) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (31038 ÷ 7 = 4434) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 31038 a prime number?
No. 31038 = 2 × 3 × 7 × 739, so it is divisible by 2.
What are the factors of 31038?
1, 2, 3, 6, 7, 14, 21, 42, 739, 1478, 2217, 4434, 5173, 10346, 15519, 31038.
What is 31038 in binary?
111100100111110 (hexadecimal 793E, octal 74476).
What is the square root of 31038?
About 176.1760.
Is 31038 divisible by 3?
Yes. Its digits add up to 15, a multiple of 3.
What is special about the number 31038?
It is a composite number with 16 divisors.