128932568 has 16 divisors (see below), whose sum is σ = 248282880. Its totient is φ = 62723808.

The previous prime is 128932567. The next prime is 128932571. The reversal of 128932568 is 865239821.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128932561) 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 3 ways as a sum of consecutive naturals, for example, 217496 + ... + 218087.

It is an arithmetic number, because the mean of its divisors is an integer number (15517680).

Almost surely, 2^128932568 is an apocalyptic number.

It is an amenable number.

128932568 is a deficient number, since it is larger than the sum of its proper divisors (119350312).

128932568 is a wasteful number, since it uses less digits than its factorization.

128932568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435626 (or 435622 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 128932568 is about 11354.8477752896. The cubic root of 128932568 is about 505.1893783734.

The spelling of 128932568 in words is "one hundred twenty-eight million, nine hundred thirty-two thousand, five hundred sixty-eight".