128591132 has 24 divisors (see below), whose sum is σ = 232377600. Its totient is φ = 62216640.

The previous prime is 128591123. The next prime is 128591143. The reversal of 128591132 is 231195821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25994 + ... + 30542.

It is an arithmetic number, because the mean of its divisors is an integer number (9682400).

Almost surely, 2^128591132 is an apocalyptic number.

It is an amenable number.

128591132 is a deficient number, since it is larger than the sum of its proper divisors (103786468).

128591132 is a wasteful number, since it uses less digits than its factorization.

128591132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781 (or 4779 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 128591132 is about 11339.8029965251. The cubic root of 128591132 is about 504.7430408581.

The spelling of 128591132 in words is "one hundred twenty-eight million, five hundred ninety-one thousand, one hundred thirty-two".