198897000 has 128 divisors (see below), whose sum is σ = 625847040. Its totient is φ = 52588800.

The previous prime is 198896989. The next prime is 198897007. The reversal of 198897000 is 798891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198897007) 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 31 ways as a sum of consecutive naturals, for example, 500802 + ... + 501198.

It is an arithmetic number, because the mean of its divisors is an integer number (4889430).

Almost surely, 2^198897000 is an apocalyptic number.

198897000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198897000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312923520).

198897000 is an abundant number, since it is smaller than the sum of its proper divisors (426950040).

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

198897000 is a wasteful number, since it uses less digits than its factorization.

198897000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 198897000 is about 14103.0847689433. The cubic root of 198897000 is about 583.7265013842.

The spelling of 198897000 in words is "one hundred ninety-eight million, eight hundred ninety-seven thousand".