The number 76990
76990 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 7699. Divisors (8): 1, 2, 5, 10, 7699, 15398, 38495, 76990.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
76990 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
76990 is composite. Its prime factorisation is
- 3
The divisors add up to 138600; without 76990 itself that is 61610, so 76990 is deficient (61610 is less than 76990). Euler's totient φ(76990) = 30792 numbers up to 76990 share no factor with it.
- 4
The digits of 76990 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 76 steps to reach 1.
LaTeX source of the formulas on this page
\[ 76990 = 2 \times 5 \times 7699 \]
76990 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 138600 |
| Euler totient φ(n) | 30792 |
| Square | 5927460100 |
| Cube | 456355153099000 |
| Square root | 277.470719 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 76 |
| Scientific notation | 7.699 × |
76990 in other forms
| Form | Value |
|---|---|
| In words | seventy-six thousand nine hundred and ninety |
| Binary (base 2) | 10010110010111110 |
| Octal (base 8) | 226276 |
| Hexadecimal (base 16) | 12CBE |
| Base 3 | 10220121111 |
| As time | 76990 seconds = 21 h 23 min 10 s |
Is 76990 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (76990 ÷ 2 = 38495) | 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 | Yes (76990 ÷ 5 = 15398) | 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 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (76990 ÷ 10 = 7699) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 1) | 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 76990 a prime number?
No. 76990 = 2 × 5 × 7699, so it is divisible by 2.
What are the factors of 76990?
1, 2, 5, 10, 7699, 15398, 38495, 76990.
What is 76990 in binary?
10010110010111110 (hexadecimal 12CBE, octal 226276).
What is the square root of 76990?
About 277.4707.
Is 76990 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 76990?
It is a composite number with 8 divisors.