128786198 has 16 divisors (see below), whose sum is σ = 194853600. Its totient is φ = 63837696.

The previous prime is 128786197. The next prime is 128786209. The reversal of 128786198 is 891687821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128786197) 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, 214703 + ... + 215301.

It is an arithmetic number, because the mean of its divisors is an integer number (12178350).

Almost surely, 2^128786198 is an apocalyptic number.

128786198 is a deficient number, since it is larger than the sum of its proper divisors (66067402).

128786198 is a wasteful number, since it uses less digits than its factorization.

128786198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its digits is 387072, while the sum is 50.

The square root of 128786198 is about 11348.4006802721. The cubic root of 128786198 is about 504.9981348165.

The spelling of 128786198 in words is "one hundred twenty-eight million, seven hundred eighty-six thousand, one hundred ninety-eight".