128081198 has 24 divisors (see below), whose sum is σ = 229535352. Its totient is φ = 53406864.

The previous prime is 128081159. The next prime is 128081207. The reversal of 128081198 is 891180821.

It is a happy number.

It is a super-2 number, since 2×128081198² = 32809586562230408, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14036 + ... + 21287.

It is an arithmetic number, because the mean of its divisors is an integer number (9563973).

Almost surely, 2^128081198 is an apocalyptic number.

128081198 is a deficient number, since it is larger than the sum of its proper divisors (101454154).

128081198 is a wasteful number, since it uses less digits than its factorization.

128081198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35376 (or 35369 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 38.

The square root of 128081198 is about 11317.2964085951. The cubic root of 128081198 is about 504.0749631295.

The spelling of 128081198 in words is "one hundred twenty-eight million, eighty-one thousand, one hundred ninety-eight".