678226 has 8 divisors (see below), whose sum is σ = 1026684. Its totient is φ = 336000.

The previous prime is 678221. The next prime is 678229. The reversal of 678226 is 622876.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 616225 + 62001 = 785^2 + 249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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

678226 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275 + ... + 1726.

2⁶⁷⁸²²⁶ is an apocalyptic number.

678226 is a deficient number, since it is larger than the sum of its proper divisors (348458).

678226 is a wasteful number, since it uses less digits than its factorization.

678226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3116.

The product of its digits is 8064, while the sum is 31.

The square root of 678226 is about 823.5447771676. The cubic root of 678226 is about 87.8600564960.

The spelling of 678226 in words is "six hundred seventy-eight thousand, two hundred twenty-six".