128258668 has 6 divisors (see below), whose sum is σ = 224452676. Its totient is φ = 64129332.

The previous prime is 128258651. The next prime is 128258681. The reversal of 128258668 is 866852821.

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 as a sum of consecutive naturals, namely, 16032330 + ... + 16032337.

Almost surely, 2^128258668 is an apocalyptic number.

It is an amenable number.

128258668 is a deficient number, since it is larger than the sum of its proper divisors (96194008).

128258668 is a wasteful number, since it uses less digits than its factorization.

128258668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32064671 (or 32064669 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 128258668 is about 11325.1343479890. The cubic root of 128258668 is about 504.3076720126.

The spelling of 128258668 in words is "one hundred twenty-eight million, two hundred fifty-eight thousand, six hundred sixty-eight".