The number 76490
76490 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 7649. Divisors (8): 1, 2, 5, 10, 7649, 15298, 38245, 76490.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
76490 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
76490 is composite. Its prime factorisation is
- 3
The divisors add up to 137700; without 76490 itself that is 61210, so 76490 is deficient (61210 is less than 76490). Euler's totient φ(76490) = 30592 numbers up to 76490 share no factor with it.
- 4
The digits of 76490 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 81 steps to reach 1.
LaTeX source of the formulas on this page
\[ 76490 = 2 \times 5 \times 7649 \]
76490 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 137700 |
| Euler totient φ(n) | 30592 |
| Square | 5850720100 |
| Cube | 447521580449000 |
| Square root | 276.568256 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 81 |
| Scientific notation | 7.649 × |
76490 in other forms
| Form | Value |
|---|---|
| In words | seventy-six thousand four hundred and ninety |
| Binary (base 2) | 10010101011001010 |
| Octal (base 8) | 225312 |
| Hexadecimal (base 16) | 12ACA |
| Base 3 | 10212220222 |
| As time | 76490 seconds = 21 h 14 min 50 s |
Is 76490 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (76490 ÷ 2 = 38245) | 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 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (76490 ÷ 5 = 15298) | 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 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (76490 ÷ 10 = 7649) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 76490 a prime number?
No. 76490 = 2 × 5 × 7649, so it is divisible by 2.
What are the factors of 76490?
1, 2, 5, 10, 7649, 15298, 38245, 76490.
What is 76490 in binary?
10010101011001010 (hexadecimal 12ACA, octal 225312).
What is the square root of 76490?
About 276.5683.
Is 76490 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 76490?
It is a composite number with 8 divisors.