198378 has 24 divisors (see below), whose sum is σ = 438048. Its totient is φ = 64872.

The previous prime is 198377. The next prime is 198391. The reversal of 198378 is 873891.

198378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1801 + ... + 1907.

It is an arithmetic number, because the mean of its divisors is an integer number (18252).

2¹⁹⁸³⁷⁸ is an apocalyptic number.

198378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

198378 is an abundant number, since it is smaller than the sum of its proper divisors (239670).

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

198378 is a wasteful number, since it uses less digits than its factorization.

198378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 215 counting only the distinct ones).

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

The square root of 198378 is about 445.3964526127. The cubic root of 198378 is about 58.3218335608.

It can be divided in two parts, 198 and 378, that added together give a square (576 = 24²).

The spelling of 198378 in words is "one hundred ninety-eight thousand, three hundred seventy-eight".