198819928 has 16 divisors (see below), whose sum is σ = 373253760. Its totient is φ = 99285600.

The previous prime is 198819919. The next prime is 198819931. The reversal of 198819928 is 829918891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8568 + ... + 21703.

It is an arithmetic number, because the mean of its divisors is an integer number (23328360).

Almost surely, 2^198819928 is an apocalyptic number.

It is an amenable number.

198819928 is a deficient number, since it is larger than the sum of its proper divisors (174433832).

198819928 is a wasteful number, since it uses less digits than its factorization.

198819928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31098 (or 31094 counting only the distinct ones).

The product of its digits is 746496, while the sum is 55.

The square root of 198819928 is about 14100.3520523425. The cubic root of 198819928 is about 583.6510942116.

The spelling of 198819928 in words is "one hundred ninety-eight million, eight hundred nineteen thousand, nine hundred twenty-eight".