128081886 has 8 divisors (see below), whose sum is σ = 256163784. Its totient is φ = 42693960.

The previous prime is 128081881. The next prime is 128081887. The reversal of 128081886 is 688180821.

It is a sphenic number, since it is the product of 3 distinct primes.

128081886 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128081881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10673485 + ... + 10673496.

It is an arithmetic number, because the mean of its divisors is an integer number (32020473).

Almost surely, 2^128081886 is an apocalyptic number.

128081886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128081886 is a wasteful number, since it uses less digits than its factorization.

128081886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21346986.

The product of its (nonzero) digits is 49152, while the sum is 42.

The square root of 128081886 is about 11317.3268045064. The cubic root of 128081886 is about 504.0758656897.

The spelling of 128081886 in words is "one hundred twenty-eight million, eighty-one thousand, eight hundred eighty-six".