The number 70420
70420 is a composite number with 24 divisors. Its prime factorisation is × 5 × 7 × 503. Divisors (24): 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 503, 1006, 2012, 2515 … 70420.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
70420 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
70420 is composite. Its prime factorisation is
- 3
The divisors add up to 169344; without 70420 itself that is 98924, so 70420 is abundant (98924 is more than 70420). Euler's totient φ(70420) = 24096 numbers up to 70420 share no factor with it.
- 4
The digits of 70420 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 143 steps to reach 1.
LaTeX source of the formulas on this page
\[ 70420 = 2^{2} \times 5 \times 7 \times 503 \]70420 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 24 |
| Sum of divisors | 169344 |
| Euler totient φ(n) | 24096 |
| Square | 4958976400 |
| Cube | 349211118088000 |
| Square root | 265.367669 (= 2√17605) |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 143 |
| Scientific notation | 7.042 × |
70420 in other forms
| Form | Value |
|---|---|
| In words | seventy thousand four hundred and twenty |
| Binary (base 2) | 10001001100010100 |
| Octal (base 8) | 211424 |
| Hexadecimal (base 16) | 11314 |
| Base 3 | 10120121011 |
| As time | 70420 seconds = 19 h 33 min 40 s |
Is 70420 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (70420 ÷ 2 = 35210) | 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 | Yes (70420 ÷ 4 = 17605) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (70420 ÷ 5 = 14084) | 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 | Yes (70420 ÷ 7 = 10060) | 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 4) | 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 (70420 ÷ 10 = 7042) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 4) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 70420 a prime number?
No. 70420 = × 5 × 7 × 503, so it is divisible by 2.
What are the factors of 70420?
1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 503, 1006, 2012, 2515, 3521, 5030, 7042, 10060, 14084, 17605, 35210, 70420.
What is 70420 in binary?
10001001100010100 (hexadecimal 11314, octal 211424).
What is the square root of 70420?
About 265.3677, exactly 2√17605.
Is 70420 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 70420?
It is a composite number with 24 divisors.