128095891 has 16 divisors (see below), whose sum is σ = 168111360. Its totient is φ = 94560480.

The previous prime is 128095889. The next prime is 128095897. The reversal of 128095891 is 198590821.

It is not a de Polignac number, because 128095891 - 2¹ = 128095889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128095897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42316 + ... + 45241.

It is an arithmetic number, because the mean of its divisors is an integer number (10506960).

Almost surely, 2^128095891 is an apocalyptic number.

128095891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128095891 is a deficient number, since it is larger than the sum of its proper divisors (40015469).

128095891 is a wasteful number, since it uses less digits than its factorization.

128095891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87594.

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 128095891 is about 11317.9455291144. The cubic root of 128095891 is about 504.0942375959.

The spelling of 128095891 in words is "one hundred twenty-eight million, ninety-five thousand, eight hundred ninety-one".