128627678 has 16 divisors (see below), whose sum is σ = 204753744. Its totient is φ = 60393600.

The previous prime is 128627671. The next prime is 128627683. The reversal of 128627678 is 876726821.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128627671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11828 + ... + 19928.

It is an arithmetic number, because the mean of its divisors is an integer number (12797109).

Almost surely, 2^128627678 is an apocalyptic number.

128627678 is a deficient number, since it is larger than the sum of its proper divisors (76126066).

128627678 is a wasteful number, since it uses less digits than its factorization.

128627678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8587.

The product of its digits is 451584, while the sum is 47.

The square root of 128627678 is about 11341.4142857053. The cubic root of 128627678 is about 504.7908528435.

The spelling of 128627678 in words is "one hundred twenty-eight million, six hundred twenty-seven thousand, six hundred seventy-eight".