2218394 has 4 divisors (see below), whose sum is σ = 3327594. Its totient is φ = 1109196.

The previous prime is 2218367. The next prime is 2218423. The reversal of 2218394 is 4938122.

2218394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 2211169 + 7225 = 1487^2 + 85^2 .

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 as a sum of consecutive naturals, namely, 554597 + ... + 554600.

2^2218394 is an apocalyptic number.

2218394 is a deficient number, since it is larger than the sum of its proper divisors (1109200).

2218394 is a wasteful number, since it uses less digits than its factorization.

2218394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109199.

The product of its digits is 3456, while the sum is 29.

The square root of 2218394 is about 1489.4274067574. The cubic root of 2218394 is about 130.4206100511.

The spelling of 2218394 in words is "two million, two hundred eighteen thousand, three hundred ninety-four".