198421338 has 8 divisors (see below), whose sum is σ = 396842688. Its totient is φ = 66140444.

The previous prime is 198421337. The next prime is 198421361. The reversal of 198421338 is 833124891.

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

198421338 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 198421296 and 198421305.

It is not an unprimeable number, because it can be changed into a prime (198421337) 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 3 ways as a sum of consecutive naturals, for example, 16535106 + ... + 16535117.

It is an arithmetic number, because the mean of its divisors is an integer number (49605336).

Almost surely, 2^198421338 is an apocalyptic number.

198421338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

198421338 is a wasteful number, since it uses less digits than its factorization.

198421338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33070228.

The product of its digits is 41472, while the sum is 39.

The square root of 198421338 is about 14086.2109170635. The cubic root of 198421338 is about 583.2608028097.

The spelling of 198421338 in words is "one hundred ninety-eight million, four hundred twenty-one thousand, three hundred thirty-eight".