128611768 has 16 divisors (see below), whose sum is σ = 251632080. Its totient is φ = 61509888.

The previous prime is 128611751. The next prime is 128611771. The reversal of 128611768 is 867116821.

It is a self number, because there is not a number n which added to its sum of digits gives 128611768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349305 + ... + 349672.

It is an arithmetic number, because the mean of its divisors is an integer number (15727005).

Almost surely, 2^128611768 is an apocalyptic number.

It is an amenable number.

128611768 is a deficient number, since it is larger than the sum of its proper divisors (123020312).

128611768 is a wasteful number, since it uses less digits than its factorization.

128611768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699006 (or 699002 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 128611768 is about 11340.7128523740. The cubic root of 128611768 is about 504.7700394028.

The spelling of 128611768 in words is "one hundred twenty-eight million, six hundred eleven thousand, seven hundred sixty-eight".