The base of the Chinese number system is ten.
base 5
290
As far as I can see, 5649808 is already in the base ten number system.
It is: 290
290
290
290
In base ten, ten is not a prime number. It is divisible by both 2 and 5. In base 2, however, 10 is equal to two in base ten and two is a prime number.
To round a number to the nearest ten, you look at the digit in the tens place. In this case, the digit in the tens place of 292 is 9. Since 9 is closer to 10 than it is to 0, the number 292 rounded to the nearest ten is 290.
The base of the Chinese number system is ten.
base 5
290
The number system commonly used by humans is base-ten.
294 rounded to the nearest ten is 290. 294 rounded to the nearest hundred is 300.
290 is not prime. 290 = 2 * 5 * 29
Ten.