998198422 has 8 divisors (see below), whose sum is σ = 1612474416. Its totient is φ = 460706952.

The previous prime is 998198393. The next prime is 998198477. The reversal of 998198422 is 224891899.

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

It is a self number, because there is not a number n which added to its sum of digits gives 998198422.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19196098 + ... + 19196149.

It is an arithmetic number, because the mean of its divisors is an integer number (201559302).

Almost surely, 2^998198422 is an apocalyptic number.

998198422 is a deficient number, since it is larger than the sum of its proper divisors (614275994).

998198422 is a wasteful number, since it uses less digits than its factorization.

998198422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38392262.

The product of its digits is 746496, while the sum is 52.

The square root of 998198422 is about 31594.2783111120. The cubic root of 998198422 is about 999.3991130071.

It can be divided in two parts, 99819 and 8422, that added together give a square (108241 = 329²).

The spelling of 998198422 in words is "nine hundred ninety-eight million, one hundred ninety-eight thousand, four hundred twenty-two".