678198 has 32 divisors (see below), whose sum is σ = 1473120. Its totient is φ = 207360.

The previous prime is 678191. The next prime is 678199. The reversal of 678198 is 891876.

678198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (24192) is a multiple of the sum of its prime divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6168 + ... + 6276.

It is an arithmetic number, because the mean of its divisors is an integer number (46035).

2⁶⁷⁸¹⁹⁸ is an apocalyptic number.

678198 is an abundant number, since it is smaller than the sum of its proper divisors (794922).

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

678198 is a wasteful number, since it uses less digits than its factorization.

678198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192.

The product of its digits is 24192, while the sum is 39.

The square root of 678198 is about 823.5277773093. The cubic root of 678198 is about 87.8588474028.

The spelling of 678198 in words is "six hundred seventy-eight thousand, one hundred ninety-eight".