There are 4 significant digits
There are seven (7) significant digits in 4032010.
Five
1
Three.
5 of them.
There are 4 significant digits
There are seven (7) significant digits in 4032010.
4 significant figures.
8 significant figures.
3 significant figures.
Five
4
8 of them.
All of them.
One. The leading zeroes are not significant.
There are 6 significant digits in the measurement 589.040 newtons.