Every integer is all three.
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Every integer is also a rational number and a real number.
It is an integer. All integers are rational but not irrational. All rational and irrational numbers are real numbers.
No, 3.4 is not an integer. It is a rational number and a real number, but not an integer.
It is a real rational negative integer number whose value is -3
It is rational, whole, integer and real but not natural nor irrational.