189450 has 36 divisors (see below), whose sum is σ = 510198. Its totient is φ = 50400.

The previous prime is 189439. The next prime is 189463. The reversal of 189450 is 54981.

189450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 74529 + 114921 = 273^2 + 339^2 .

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 189450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 240 + ... + 660.

2¹⁸⁹⁴⁵⁰ is an apocalyptic number.

189450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255099).

189450 is an abundant number, since it is smaller than the sum of its proper divisors (320748).

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

189450 is a wasteful number, since it uses less digits than its factorization.

189450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 189450 is about 435.2585438564. The cubic root of 189450 is about 57.4334453638.

The spelling of 189450 in words is "one hundred eighty-nine thousand, four hundred fifty".