2218406 has 8 divisors (see below), whose sum is σ = 3340704. Its totient is φ = 1104840.

The previous prime is 2218367. The next prime is 2218423. The reversal of 2218406 is 6048122.

2218406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 1505 + ... + 2588.

It is an arithmetic number, because the mean of its divisors is an integer number (417588).

2^2218406 is an apocalyptic number.

2218406 is a deficient number, since it is larger than the sum of its proper divisors (1122298).

2218406 is a wasteful number, since it uses less digits than its factorization.

2218406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2218406 is about 1489.4314351456. The cubic root of 2218406 is about 130.4208452129.

The spelling of 2218406 in words is "two million, two hundred eighteen thousand, four hundred six".