9812218 has 8 divisors (see below), whose sum is σ = 15850548. Its totient is φ = 4528704.

The previous prime is 9812207. The next prime is 9812233. The reversal of 9812218 is 8122189.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7601049 + 2211169 = 2757^2 + 1487^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 9812218.

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, 188671 + ... + 188722.

Almost surely, 2^9812218 is an apocalyptic number.

9812218 is a deficient number, since it is larger than the sum of its proper divisors (6038330).

9812218 is a wasteful number, since it uses less digits than its factorization.

9812218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377408.

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

The square root of 9812218 is about 3132.4460091117. The cubic root of 9812218 is about 214.0863918810.

The spelling of 9812218 in words is "nine million, eight hundred twelve thousand, two hundred eighteen".