198866836 has 12 divisors (see below), whose sum is σ = 397733728. Its totient is φ = 85228632.

The previous prime is 198866827. The next prime is 198866839. The reversal of 198866836 is 638668891.

It is a happy number.

198866836 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198866839) 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, 3551166 + ... + 3551221.

Almost surely, 2^198866836 is an apocalyptic number.

It is an amenable number.

198866836 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.

198866836 is a wasteful number, since it uses less digits than its factorization.

198866836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102398 (or 7102396 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 198866836 is about 14102.0153169680. The cubic root of 198866836 is about 583.6969912753.

The spelling of 198866836 in words is "one hundred ninety-eight million, eight hundred sixty-six thousand, eight hundred thirty-six".