MongoDB differences between NumberLong and simple Integer?

Question

What are the main differences (size, speed, etc) between the datatypes double, NumberLong, NumberInt or a simple Integer in MongoDB?

If I want to save a small fixed

Answer 1

NumberInt

By default, the mongo shell treats all numbers as floating-point values. The mongo shell provides the NumberInt() constructor to explicitly specify 32-bit integers.

NumberLong

By default, the mongo shell treats all numbers as floating-point values. The mongo shell provides the NumberLong() class to handle 64-bit integers.

The NumberLong() constructor accepts the long as a string:

NumberLong("2090845886852")

Source: http://docs.mongodb.org/manual/core/shell-types/