import re


def divisable_by_two(string):
    if string.isdigit() == True :
        last = string[-1]
        if string.startswith('-') | (len(string)>1 and string.startswith('0')):
	        return False
        else:
            return bool(re.match(r"2|4|6|8|0", last))
    else:
	    return False