128927871 has 6 divisors (see below), whose sum is σ = 186229160. Its totient is φ = 85951908.

The previous prime is 128927837. The next prime is 128927873. The reversal of 128927871 is 178729821.

It is not a de Polignac number, because 128927871 - 2⁶ = 128927807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128927873) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7162651 + ... + 7162668.

Almost surely, 2^128927871 is an apocalyptic number.

128927871 is a deficient number, since it is larger than the sum of its proper divisors (57301289).

128927871 is a wasteful number, since it uses less digits than its factorization.

128927871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14325325 (or 14325322 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 128927871 is about 11354.6409454461. The cubic root of 128927871 is about 505.1832436334.

The spelling of 128927871 in words is "one hundred twenty-eight million, nine hundred twenty-seven thousand, eight hundred seventy-one".