def human_format(num):
    num = int(num)
    if num < 1000:
        return num
    magnitude = 0
    while abs(num) >= 1000:
        magnitude += 1
        num /= 1000.0
    # thousands, millions, billions, trillions, quadrillion
    return '%.2f%s' % (num, ['', 'K', 'M', 'B', 'T', 'Qd', 'Qt', 'S',  'Qd', 'Qt', 'S', 'Oc', 'Non', 'Dec'][magnitude])