function getPos(num){
	var bottomCorner = Math.ceil(Math.sqrt(num));
	if(bottomCorner%2 == 0){
		bottomCorner++;
	}
	var sidelength = bottomCorner - 1;
	var timesRound = (Math.pow(bottomCorner, 2) - num) / (bottomCorner - 1);
	var lastsection = timesRound % 1;
	var centerdistance = (Math.abs(0.5 - lastsection)) * sidelength;
	console.log((sidelength / 2) + centerdistance);
}

getPos(325489);