189030000 has 100 divisors (see below), whose sum is σ = 610310888. Its totient is φ = 50400000.

The previous prime is 189029983. The next prime is 189030013. The reversal of 189030000 is 30981.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26850 + ... + 33150.

Almost surely, 2^189030000 is an apocalyptic number.

189030000 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 189030000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305155444).

189030000 is an abundant number, since it is smaller than the sum of its proper divisors (421280888).

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

189030000 is an equidigital number, since it uses as much as digits as its factorization.

189030000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6332 (or 6311 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 189030000 is about 13748.8181310249. The cubic root of 189030000 is about 573.9097172123.

Adding to 189030000 its reverse (30981), we get a palindrome (189060981).

The spelling of 189030000 in words is "one hundred eighty-nine million, thirty thousand".