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30 is the integer that proceeds 29 and preceeds 31. It's prime facorization is 2*3*5.  30 is an even number. Its prime factors are 2, 3, and 5. Its factors are 1, 2, 3, 5, 6, 10, and 15. It is an abundant number. Its square root is approximately 5.47722557.  A number is divisible by 30 if it is divisible by 3 and 10.