128768194 has 16 divisors (see below), whose sum is σ = 196701696. Its totient is φ = 63205200.

The previous prime is 128768161. The next prime is 128768197. The reversal of 128768194 is 491867821.

It is not an unprimeable number, because it can be changed into a prime (128768197) 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, 117919 + ... + 119005.

It is an arithmetic number, because the mean of its divisors is an integer number (12293856).

Almost surely, 2^128768194 is an apocalyptic number.

128768194 is a deficient number, since it is larger than the sum of its proper divisors (67933502).

128768194 is a wasteful number, since it uses less digits than its factorization.

128768194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121.

The product of its digits is 193536, while the sum is 46.

The square root of 128768194 is about 11347.6074130188. The cubic root of 128768194 is about 504.9746012126.

The spelling of 128768194 in words is "one hundred twenty-eight million, seven hundred sixty-eight thousand, one hundred ninety-four".