198685144 has 16 divisors (see below), whose sum is σ = 425754000. Its totient is φ = 85150752.

The previous prime is 198685141. The next prime is 198685159. The reversal of 198685144 is 441586891.

It is a junction number, because it is equal to n+sod(n) for n = 198685094 and 198685103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198685141) 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, 1773919 + ... + 1774030.

It is an arithmetic number, because the mean of its divisors is an integer number (26609625).

Almost surely, 2^198685144 is an apocalyptic number.

198685144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

198685144 is an abundant number, since it is smaller than the sum of its proper divisors (227068856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198685144 is a wasteful number, since it uses less digits than its factorization.

198685144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547962 (or 3547958 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The square root of 198685144 is about 14095.5717869124. The cubic root of 198685144 is about 583.5191748191.

The spelling of 198685144 in words is "one hundred ninety-eight million, six hundred eighty-five thousand, one hundred forty-four".