198555000 has 320 divisors, whose sum is σ = 743761920. Its totient is φ = 43200000.

The previous prime is 198554989. The next prime is 198555011. The reversal of 198555000 is 555891.

It is an interprime number because it is at equal distance from previous prime (198554989) and next prime (198555011).

It is a congruent number.

It is an unprimeable number.

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 79 ways as a sum of consecutive naturals, for example, 3254970 + ... + 3255030.

It is an arithmetic number, because the mean of its divisors is an integer number (2324256).

Almost surely, 2^198555000 is an apocalyptic number.

198555000 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 198555000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371880960).

198555000 is an abundant number, since it is smaller than the sum of its proper divisors (545206920).

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

198555000 is a wasteful number, since it uses less digits than its factorization.

198555000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 33.

The square root of 198555000 is about 14090.9545453812. The cubic root of 198555000 is about 583.3917401835.

The spelling of 198555000 in words is "one hundred ninety-eight million, five hundred fifty-five thousand".