1024

Multiplying 2 for 10 times becomes 1024. This is nearly number of 1,000, so used in computer. And the numbers are separated with this unit; 1,000 equals to kilo, 1,000,000 equals to mega, 1,000,000,000 equals giga and 1,000,000,000,000 equals tera. But because of this approximation, there is a little difference, error, between two numbers; 1 kilo byte is not 1,000 byte but 1,024 byte, and 1 mega byte is 1,048,576 byte.