672218 has 4 divisors (see below), whose sum is σ = 1008330. Its totient is φ = 336108.

The previous prime is 672209. The next prime is 672223. The reversal of 672218 is 812276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 388129 + 284089 = 623^2 + 533^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 672218.

It is an unprimeable number.

672218 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 as a sum of consecutive naturals, namely, 168053 + ... + 168056.

2⁶⁷²²¹⁸ is an apocalyptic number.

672218 is a deficient number, since it is larger than the sum of its proper divisors (336112).

672218 is a wasteful number, since it uses less digits than its factorization.

672218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336111.

The product of its digits is 1344, while the sum is 26.

The square root of 672218 is about 819.8890168797. The cubic root of 672218 is about 87.5998533528.

The spelling of 672218 in words is "six hundred seventy-two thousand, two hundred eighteen".