198619794 has 24 divisors (see below), whose sum is σ = 430847040. Its totient is φ = 66129048.

The previous prime is 198619793. The next prime is 198619847. The reversal of 198619794 is 497916891.

198619794 is a `hidden beast` number, since 19 + 8 + 619 + 7 + 9 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 198619794.

It is not an unprimeable number, because it can be changed into a prime (198619793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10539 + ... + 22545.

It is an arithmetic number, because the mean of its divisors is an integer number (17951960).

Almost surely, 2^198619794 is an apocalyptic number.

198619794 is an abundant number, since it is smaller than the sum of its proper divisors (232227246).

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

198619794 is a wasteful number, since it uses less digits than its factorization.

198619794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12934 (or 12931 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 198619794 is about 14093.2534923629. The cubic root of 198619794 is about 583.4551922470.

The spelling of 198619794 in words is "one hundred ninety-eight million, six hundred nineteen thousand, seven hundred ninety-four".