198722798 has 4 divisors (see below), whose sum is σ = 298084200. Its totient is φ = 99361398.

The previous prime is 198722791. The next prime is 198722827. The reversal of 198722798 is 897227891.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198722791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49680698 + ... + 49680701.

It is an arithmetic number, because the mean of its divisors is an integer number (74521050).

Almost surely, 2^198722798 is an apocalyptic number.

198722798 is a deficient number, since it is larger than the sum of its proper divisors (99361402).

198722798 is an equidigital number, since it uses as much as digits as its factorization.

198722798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99361401.

The product of its digits is 1016064, while the sum is 53.

The square root of 198722798 is about 14096.9073913394. The cubic root of 198722798 is about 583.5560345505.

The spelling of 198722798 in words is "one hundred ninety-eight million, seven hundred twenty-two thousand, seven hundred ninety-eight".