2918218 has 4 divisors (see below), whose sum is σ = 4377330. Its totient is φ = 1459108.

The previous prime is 2918213. The next prime is 2918231. The reversal of 2918218 is 8128192.

It is a happy number.

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., 2634129 + 284089 = 1623^2 + 533^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2918218.

It is not an unprimeable number, because it can be changed into a prime (2918213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 729553 + ... + 729556.

2^2918218 is an apocalyptic number.

2918218 is a deficient number, since it is larger than the sum of its proper divisors (1459112).

2918218 is a wasteful number, since it uses less digits than its factorization.

2918218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459111.

The product of its digits is 2304, while the sum is 31.

The square root of 2918218 is about 1708.2792511765. The cubic root of 2918218 is about 142.9023082905.

It can be divided in two parts, 2918 and 218, that added together give a square (3136 = 56²).

The spelling of 2918218 in words is "two million, nine hundred eighteen thousand, two hundred eighteen".