198425128 has 16 divisors (see below), whose sum is σ = 405869760. Its totient is φ = 90193200.

The previous prime is 198425099. The next prime is 198425159. The reversal of 198425128 is 821524891.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127328 + ... + 1127503.

It is an arithmetic number, because the mean of its divisors is an integer number (25366860).

Almost surely, 2^198425128 is an apocalyptic number.

It is an amenable number.

198425128 is an abundant number, since it is smaller than the sum of its proper divisors (207444632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198425128 is a wasteful number, since it uses less digits than its factorization.

198425128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254848 (or 2254844 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

The square root of 198425128 is about 14086.3454451465. The cubic root of 198425128 is about 583.2645163626.

The spelling of 198425128 in words is "one hundred ninety-eight million, four hundred twenty-five thousand, one hundred twenty-eight".