128305198 has 32 divisors (see below), whose sum is σ = 224550144. Its totient is φ = 53851392.

The previous prime is 128305181. The next prime is 128305207. The reversal of 128305198 is 891503821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144865 + ... + 145747.

It is an arithmetic number, because the mean of its divisors is an integer number (7017192).

Almost surely, 2^128305198 is an apocalyptic number.

128305198 is a deficient number, since it is larger than the sum of its proper divisors (96244946).

128305198 is a wasteful number, since it uses less digits than its factorization.

128305198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 128305198 is about 11327.1884419745. The cubic root of 128305198 is about 504.3686493050.

The spelling of 128305198 in words is "one hundred twenty-eight million, three hundred five thousand, one hundred ninety-eight".