5.8e7 is a larger number than 9.5e5.
5.8e7 can be written as 58,000,000, and 9.5e5 can be written as 950,000.
Conductivity is a measure of the ability of a material to conduct electricity. A large conductivity means that the material conducts electricity well. The units of electrical conductivity are siemens per meter (Sm-1).