678222 has 24 divisors (see below), whose sum is σ = 1506960. Its totient is φ = 220320.

The previous prime is 678221. The next prime is 678229. The reversal of 678222 is 222876.

678222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11 ways as a sum of consecutive naturals, for example, 279 + ... + 1197.

It is an arithmetic number, because the mean of its divisors is an integer number (62790).

2⁶⁷⁸²²² is an apocalyptic number.

678222 is an abundant number, since it is smaller than the sum of its proper divisors (828738).

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

678222 is a wasteful number, since it uses less digits than its factorization.

678222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 965 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 678222 is about 823.5423486379. The cubic root of 678222 is about 87.8598837705.

It can be divided in two parts, 678 and 222, that added together give a square (900 = 30²).

The spelling of 678222 in words is "six hundred seventy-eight thousand, two hundred twenty-two".