189378 has 40 divisors (see below), whose sum is σ = 487872. Its totient is φ = 53784.

The previous prime is 189377. The next prime is 189389. The reversal of 189378 is 873981.

189378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189377) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1051 + ... + 1217.

2¹⁸⁹³⁷⁸ is an apocalyptic number.

189378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243936).

189378 is an abundant number, since it is smaller than the sum of its proper divisors (298494).

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

189378 is a wasteful number, since it uses less digits than its factorization.

189378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 179 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 189378 is about 435.1758265345. The cubic root of 189378 is about 57.4261686294.

The spelling of 189378 in words is "one hundred eighty-nine thousand, three hundred seventy-eight".