class DateUtils {

    public static String format2Readable(long ms) {

        long days = ms / (1000 * 60 * 60 * 24);
        long hours = (ms % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60);
        long minutes = (ms % (1000 * 60 * 60)) / (1000 * 60);
        long seconds = (ms % (1000 * 60)) / 1000;

        return String.format("%02d %02d:%02d:%02d", days, hours, minutes, seconds);

    }

    private  DateUtils();

}