198422819 has 8 divisors (see below), whose sum is σ = 227719680. Its totient is φ = 169363656.

The previous prime is 198422803. The next prime is 198422849. The reversal of 198422819 is 918224891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198422819 - 2⁴ = 198422803 is a prime.

It is a super-2 number, since 2×198422819² = 78743230199813522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198422819.

It is not an unprimeable number, because it can be changed into a prime (198422849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57629 + ... + 60974.

It is an arithmetic number, because the mean of its divisors is an integer number (28464960).

Almost surely, 2^198422819 is an apocalyptic number.

198422819 is a deficient number, since it is larger than the sum of its proper divisors (29296861).

198422819 is a wasteful number, since it uses less digits than its factorization.

198422819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118849.

The product of its digits is 82944, while the sum is 44.

The square root of 198422819 is about 14086.2634861059. The cubic root of 198422819 is about 583.2622539425.

The spelling of 198422819 in words is "one hundred ninety-eight million, four hundred twenty-two thousand, eight hundred nineteen".