22404218 has 8 divisors (see below), whose sum is σ = 33628980. Its totient is φ = 11194560.

The previous prime is 22404209. The next prime is 22404229. The reversal of 22404218 is 81240422.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21187609 + 1216609 = 4603^2 + 1103^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 22404193 and 22404202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1298 + ... + 6818.

Almost surely, 2^22404218 is an apocalyptic number.

22404218 is a deficient number, since it is larger than the sum of its proper divisors (11224762).

22404218 is a wasteful number, since it uses less digits than its factorization.

22404218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7552.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 22404218 is about 4733.3094130851. The cubic root of 22404218 is about 281.9096419257.

It can be divided in two parts, 22404 and 218, that added together give a palindrome (22622).

The spelling of 22404218 in words is "twenty-two million, four hundred four thousand, two hundred eighteen".