8218444 has 12 divisors (see below), whose sum is σ = 15488704. Its totient is φ = 3793104.

The previous prime is 8218439. The next prime is 8218447. The reversal of 8218444 is 4448128.

It is a super-2 number, since 2×8218444² = 135085643562272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8218447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78972 + ... + 79075.

Almost surely, 2^8218444 is an apocalyptic number.

It is an amenable number.

8218444 is a deficient number, since it is larger than the sum of its proper divisors (7270260).

8218444 is a wasteful number, since it uses less digits than its factorization.

8218444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158064 (or 158062 counting only the distinct ones).

The product of its digits is 8192, while the sum is 31.

The square root of 8218444 is about 2866.7828658620. The cubic root of 8218444 is about 201.8040448492.

It can be divided in two parts, 82184 and 44, that added together give a palindrome (82228).

The spelling of 8218444 in words is "eight million, two hundred eighteen thousand, four hundred forty-four".