128170216 has 8 divisors (see below), whose sum is σ = 240319170. Its totient is φ = 64085104.

The previous prime is 128170117. The next prime is 128170241. The reversal of 128170216 is 612071821.

It can be written as a sum of positive squares in only one way, i.e., 87796900 + 40373316 = 9370^2 + 6354^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8010631 + ... + 8010646.

Almost surely, 2^128170216 is an apocalyptic number.

It is an amenable number.

128170216 is a deficient number, since it is larger than the sum of its proper divisors (112148954).

128170216 is a wasteful number, since it uses less digits than its factorization.

128170216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16021283 (or 16021279 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 128170216 is about 11321.2285552408. The cubic root of 128170216 is about 504.1917155083.

The spelling of 128170216 in words is "one hundred twenty-eight million, one hundred seventy thousand, two hundred sixteen".