678228 has 12 divisors (see below), whose sum is σ = 1582560. Its totient is φ = 226072.

The previous prime is 678221. The next prime is 678229. The reversal of 678228 is 822876.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28248 + ... + 28271.

It is an arithmetic number, because the mean of its divisors is an integer number (131880).

2⁶⁷⁸²²⁸ is an apocalyptic number.

It is an amenable number.

678228 is an abundant number, since it is smaller than the sum of its proper divisors (904332).

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

678228 is a wasteful number, since it uses less digits than its factorization.

678228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56526 (or 56524 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 678228 is about 823.5459914297. The cubic root of 678228 is about 87.8601428586.

The spelling of 678228 in words is "six hundred seventy-eight thousand, two hundred twenty-eight".