128907932 has 12 divisors (see below), whose sum is σ = 237462120. Its totient is φ = 61061616.

The previous prime is 128907931. The next prime is 128907941. The reversal of 128907932 is 239709821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 128907932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128907931) 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, 848003 + ... + 848154.

It is an arithmetic number, because the mean of its divisors is an integer number (19788510).

Almost surely, 2^128907932 is an apocalyptic number.

It is an amenable number.

128907932 is a deficient number, since it is larger than the sum of its proper divisors (108554188).

128907932 is a wasteful number, since it uses less digits than its factorization.

128907932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696180 (or 1696178 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 128907932 is about 11353.7629004661. The cubic root of 128907932 is about 505.1571996965.

The spelling of 128907932 in words is "one hundred twenty-eight million, nine hundred seven thousand, nine hundred thirty-two".