1678226 has 8 divisors (see below), whose sum is σ = 2746224. Its totient is φ = 762820.

The previous prime is 1678219. The next prime is 1678231. The reversal of 1678226 is 6228761.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1678192 and 1678201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38120 + ... + 38163.

It is an arithmetic number, because the mean of its divisors is an integer number (343278).

2^1678226 is an apocalyptic number.

1678226 is a deficient number, since it is larger than the sum of its proper divisors (1067998).

1678226 is a wasteful number, since it uses less digits than its factorization.

1678226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76296.

The product of its digits is 8064, while the sum is 32.

The square root of 1678226 is about 1295.4636235727. The cubic root of 1678226 is about 118.8365809948.

The spelling of 1678226 in words is "one million, six hundred seventy-eight thousand, two hundred twenty-six".