128156268 has 24 divisors (see below), whose sum is σ = 316621872. Its totient is φ = 40205824.

The previous prime is 128156261. The next prime is 128156269. The reversal of 128156268 is 862651821.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (128156261) by changing a digit.

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, 313905 + ... + 314312.

It is an arithmetic number, because the mean of its divisors is an integer number (13192578).

Almost surely, 2^128156268 is an apocalyptic number.

It is an amenable number.

128156268 is an abundant number, since it is smaller than the sum of its proper divisors (188465604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128156268 is a wasteful number, since it uses less digits than its factorization.

128156268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628241 (or 628239 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 128156268 is about 11320.6125275976. The cubic root of 128156268 is about 504.1734254526.

The spelling of 128156268 in words is "one hundred twenty-eight million, one hundred fifty-six thousand, two hundred sixty-eight".