618218 has 4 divisors (see below), whose sum is σ = 927330. Its totient is φ = 309108.

The previous prime is 618199. The next prime is 618227. The reversal of 618218 is 812816.

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., 588289 + 29929 = 767^2 + 173^2 .

It is an unprimeable number.

618218 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, 154553 + ... + 154556.

2⁶¹⁸²¹⁸ is an apocalyptic number.

618218 is a deficient number, since it is larger than the sum of its proper divisors (309112).

618218 is a wasteful number, since it uses less digits than its factorization.

618218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309111.

The product of its digits is 768, while the sum is 26.

The square root of 618218 is about 786.2684020104. The cubic root of 618218 is about 85.1884170960.

The spelling of 618218 in words is "six hundred eighteen thousand, two hundred eighteen".