198931612 has 12 divisors (see below), whose sum is σ = 379778616. Its totient is φ = 90423440.

The previous prime is 198931571. The next prime is 198931627. The reversal of 198931612 is 216139891.

It is a congruent number.

It is an unprimeable number.

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, 2260543 + ... + 2260630.

It is an arithmetic number, because the mean of its divisors is an integer number (31648218).

Almost surely, 2^198931612 is an apocalyptic number.

It is an amenable number.

198931612 is a deficient number, since it is larger than the sum of its proper divisors (180847004).

198931612 is a wasteful number, since it uses less digits than its factorization.

198931612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521188 (or 4521186 counting only the distinct ones).

The product of its digits is 23328, while the sum is 40.

The square root of 198931612 is about 14104.3118229852. The cubic root of 198931612 is about 583.7603593941.

The spelling of 198931612 in words is "one hundred ninety-eight million, nine hundred thirty-one thousand, six hundred twelve".