198378928 has 20 divisors (see below), whose sum is σ = 419301288. Its totient is φ = 90172160.

The previous prime is 198378923. The next prime is 198378959. The reversal of 198378928 is 829873891.

It is not an unprimeable number, because it can be changed into a prime (198378923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563401 + ... + 563752.

Almost surely, 2^198378928 is an apocalyptic number.

It is an amenable number.

198378928 is an abundant number, since it is smaller than the sum of its proper divisors (220922360).

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

198378928 is a wasteful number, since it uses less digits than its factorization.

198378928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127172 (or 1127166 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 55.

The square root of 198378928 is about 14084.7054637291. The cubic root of 198378928 is about 583.2192450259.

The spelling of 198378928 in words is "one hundred ninety-eight million, three hundred seventy-eight thousand, nine hundred twenty-eight".