198430000 has 50 divisors (see below), whose sum is σ = 480443084. Its totient is φ = 79368000.

The previous prime is 198429983. The next prime is 198430051. The reversal of 198430000 is 34891.

It is a tau number, because it is divible by the number of its divisors (50).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 79 + ... + 19921.

Almost surely, 2^198430000 is an apocalyptic number.

198430000 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 198430000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240221542).

198430000 is an abundant number, since it is smaller than the sum of its proper divisors (282013084).

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

198430000 is an equidigital number, since it uses as much as digits as its factorization.

198430000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19871 (or 19850 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 198430000 is about 14086.5183775126. The cubic root of 198430000 is about 583.2692900212.

Adding to 198430000 its reverse (34891), we get a palindrome (198464891).

The spelling of 198430000 in words is "one hundred ninety-eight million, four hundred thirty thousand".