128593881 has 24 divisors (see below), whose sum is σ = 210566720. Its totient is φ = 74968416.

The previous prime is 128593879. The next prime is 128593889. The reversal of 128593881 is 188395821.

It is a happy number.

It is not a de Polignac number, because 128593881 - 2¹ = 128593879 is a prime.

It is a super-2 number, since 2×128593881² = 33072772461284322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128593889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26701 + ... + 31146.

Almost surely, 2^128593881 is an apocalyptic number.

It is an amenable number.

128593881 is a deficient number, since it is larger than the sum of its proper divisors (81972839).

128593881 is a wasteful number, since it uses less digits than its factorization.

128593881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57885 (or 57882 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 128593881 is about 11339.9242060959. The cubic root of 128593881 is about 504.7466376037.

The spelling of 128593881 in words is "one hundred twenty-eight million, five hundred ninety-three thousand, eight hundred eighty-one".