198659812 has 24 divisors (see below), whose sum is σ = 374826872. Its totient is φ = 91584000.

The previous prime is 198659789. The next prime is 198659819. The reversal of 198659812 is 218956891.

It can be written as a sum of positive squares in 4 ways, for example, as 34409956 + 164249856 = 5866^2 + 12816^2 .

It is not an unprimeable number, because it can be changed into a prime (198659819) 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 7 ways as a sum of consecutive naturals, for example, 60862 + ... + 64042.

Almost surely, 2^198659812 is an apocalyptic number.

It is an amenable number.

198659812 is a deficient number, since it is larger than the sum of its proper divisors (176167060).

198659812 is a wasteful number, since it uses less digits than its factorization.

198659812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399 (or 4397 counting only the distinct ones).

The product of its digits is 311040, while the sum is 49.

The square root of 198659812 is about 14094.6731781904. The cubic root of 198659812 is about 583.4943745485.

The spelling of 198659812 in words is "one hundred ninety-eight million, six hundred fifty-nine thousand, eight hundred twelve".