128266268 has 18 divisors (see below), whose sum is σ = 243062064. Its totient is φ = 59199504.

The previous prime is 128266261. The next prime is 128266277. The reversal of 128266268 is 862662821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128266261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94196 + ... + 95547.

It is an arithmetic number, because the mean of its divisors is an integer number (13503448).

Almost surely, 2^128266268 is an apocalyptic number.

It is an amenable number.

128266268 is a deficient number, since it is larger than the sum of its proper divisors (114795796).

128266268 is a wasteful number, since it uses less digits than its factorization.

128266268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189773 (or 189758 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 128266268 is about 11325.4698798769. The cubic root of 128266268 is about 504.3176327756.

The spelling of 128266268 in words is "one hundred twenty-eight million, two hundred sixty-six thousand, two hundred sixty-eight".