198019000 has 64 divisors (see below), whose sum is σ = 470059200. Its totient is φ = 78064000.

The previous prime is 198018973. The next prime is 198019027. The reversal of 198019000 is 910891.

It is an interprime number because it is at equal distance from previous prime (198018973) and next prime (198019027).

It is a super-2 number, since 2×198019000² = 78423048722000000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198019000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69606 + ... + 72394.

It is an arithmetic number, because the mean of its divisors is an integer number (7344675).

Almost surely, 2^198019000 is an apocalyptic number.

198019000 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 198019000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235029600).

198019000 is an abundant number, since it is smaller than the sum of its proper divisors (272040200).

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

198019000 is a wasteful number, since it uses less digits than its factorization.

198019000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881 (or 2867 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 198019000 is about 14071.9223988764. The cubic root of 198019000 is about 582.8663110044.

Adding to 198019000 its reverse (910891), we get a palindrome (198929891).

The spelling of 198019000 in words is "one hundred ninety-eight million, nineteen thousand".