198598000 has 80 divisors (see below), whose sum is σ = 485147520. Its totient is φ = 78624000.

The previous prime is 198597989. The next prime is 198598007. The reversal of 198598000 is 895891.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198598007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217545 + ... + 218455.

It is an arithmetic number, because the mean of its divisors is an integer number (6064344).

Almost surely, 2^198598000 is an apocalyptic number.

198598000 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 198598000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242573760).

198598000 is an abundant number, since it is smaller than the sum of its proper divisors (286549520).

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

198598000 is a wasteful number, since it uses less digits than its factorization.

198598000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 198598000 is about 14092.4802643112. The cubic root of 198598000 is about 583.4338511589.

The spelling of 198598000 in words is "one hundred ninety-eight million, five hundred ninety-eight thousand".