It is an unprimeable number.
2189440 is an apocalyptic number.
189440 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 189440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233358).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
189440 is an equidigital number, since it uses as much as digits as its factorization.
189440 is an odious number, because the sum of its binary digits is odd.
The square root of 189440 is about 435.2470562795. The cubic root of 189440 is about 57.4324348165.
The spelling of 189440 in words is "one hundred eighty-nine thousand, four hundred forty".