128161712 has 20 divisors (see below), whose sum is σ = 283786896. Its totient is φ = 54926400.

The previous prime is 128161697. The next prime is 128161723. The reversal of 128161712 is 217161821.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

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, 572039 + ... + 572262.

Almost surely, 2^128161712 is an apocalyptic number.

It is an amenable number.

128161712 is an abundant number, since it is smaller than the sum of its proper divisors (155625184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128161712 is a wasteful number, since it uses less digits than its factorization.

128161712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144316 (or 1144310 counting only the distinct ones).

The product of its digits is 1344, while the sum is 29.

The square root of 128161712 is about 11320.8529713975. The cubic root of 128161712 is about 504.1805643446.

The spelling of 128161712 in words is "one hundred twenty-eight million, one hundred sixty-one thousand, seven hundred twelve".