198278604 has 120 divisors (see below), whose sum is σ = 563763200. Its totient is φ = 60536160.

The previous prime is 198278603. The next prime is 198278611. The reversal of 198278604 is 406872891.

198278604 is a `hidden beast` number, since 19 + 8 + 27 + 8 + 604 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 198278604.

It is not an unprimeable number, because it can be changed into a prime (198278603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 190317 + ... + 191355.

Almost surely, 2^198278604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198278604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281881600).

198278604 is an abundant number, since it is smaller than the sum of its proper divisors (365484596).

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

198278604 is a wasteful number, since it uses less digits than its factorization.

198278604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1094 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 198278604 is about 14081.1435615152. The cubic root of 198278604 is about 583.1209134235.

The spelling of 198278604 in words is "one hundred ninety-eight million, two hundred seventy-eight thousand, six hundred four".