12218288 has 20 divisors (see below), whose sum is σ = 24313920. Its totient is φ = 5943744.

The previous prime is 12218243. The next prime is 12218299. The reversal of 12218288 is 88281221.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

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, 9728 + ... + 10911.

It is an arithmetic number, because the mean of its divisors is an integer number (1215696).

Almost surely, 2^12218288 is an apocalyptic number.

It is an amenable number.

12218288 is a deficient number, since it is larger than the sum of its proper divisors (12095632).

12218288 is a wasteful number, since it uses less digits than its factorization.

12218288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20684 (or 20678 counting only the distinct ones).

The product of its digits is 4096, while the sum is 32.

The square root of 12218288 is about 3495.4667785576. The cubic root of 12218288 is about 230.3227227656.

The spelling of 12218288 in words is "twelve million, two hundred eighteen thousand, two hundred eighty-eight".