189500000 has 84 divisors (see below), whose sum is σ = 467572140. Its totient is φ = 75600000.

The previous prime is 189499997. The next prime is 189500021. The reversal of 189500000 is 5981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 499811 + ... + 500189.

It is an arithmetic number, because the mean of its divisors is an integer number (5566335).

Almost surely, 2^189500000 is an apocalyptic number.

189500000 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 189500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233786070).

189500000 is an abundant number, since it is smaller than the sum of its proper divisors (278072140).

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

189500000 is an frugal number, since it uses more digits than its factorization.

189500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 189500000 is about 13765.8998979362. The cubic root of 189500000 is about 574.3849756702.

Adding to 189500000 its reverse (5981), we get a palindrome (189505981).

The spelling of 189500000 in words is "one hundred eighty-nine million, five hundred thousand".