128566268 has 12 divisors (see below), whose sum is σ = 231072072. Its totient is φ = 62545680.

The previous prime is 128566241. The next prime is 128566271. The reversal of 128566268 is 862665821.

It is a congruent number.

It is an unprimeable number.

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, 434198 + ... + 434493.

It is an arithmetic number, because the mean of its divisors is an integer number (19256006).

Almost surely, 2^128566268 is an apocalyptic number.

It is an amenable number.

128566268 is a deficient number, since it is larger than the sum of its proper divisors (102505804).

128566268 is a wasteful number, since it uses less digits than its factorization.

128566268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868732 (or 868730 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 128566268 is about 11338.7066281830. The cubic root of 128566268 is about 504.7105068886.

The spelling of 128566268 in words is "one hundred twenty-eight million, five hundred sixty-six thousand, two hundred sixty-eight".