198728212 has 6 divisors (see below), whose sum is σ = 347774378. Its totient is φ = 99364104.

The previous prime is 198728209. The next prime is 198728279. The reversal of 198728212 is 212827891.

It can be written as a sum of positive squares in only one way, i.e., 145057936 + 53670276 = 12044^2 + 7326^2 .

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 as a sum of consecutive naturals, namely, 24841023 + ... + 24841030.

Almost surely, 2^198728212 is an apocalyptic number.

It is an amenable number.

198728212 is a deficient number, since it is larger than the sum of its proper divisors (149046166).

198728212 is a wasteful number, since it uses less digits than its factorization.

198728212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49682057 (or 49682055 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 198728212 is about 14097.0994179654. The cubic root of 198728212 is about 583.5613339654.

The spelling of 198728212 in words is "one hundred ninety-eight million, seven hundred twenty-eight thousand, two hundred twelve".