128220268 has 12 divisors (see below), whose sum is σ = 244784232. Its totient is φ = 58281920.

The previous prime is 128220259. The next prime is 128220283. The reversal of 128220268 is 862022821.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1457005 + ... + 1457092.

It is an arithmetic number, because the mean of its divisors is an integer number (20398686).

Almost surely, 2^128220268 is an apocalyptic number.

It is an amenable number.

128220268 is a deficient number, since it is larger than the sum of its proper divisors (116563964).

128220268 is a wasteful number, since it uses less digits than its factorization.

128220268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914112 (or 2914110 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 128220268 is about 11323.4388769490. The cubic root of 128220268 is about 504.2573379289.

The spelling of 128220268 in words is "one hundred twenty-eight million, two hundred twenty thousand, two hundred sixty-eight".