12214428 has 24 divisors (see below), whose sum is σ = 28562688. Its totient is φ = 4062576.

The previous prime is 12214417. The next prime is 12214441. The reversal of 12214428 is 82441221.

It is a junction number, because it is equal to n+sod(n) for n = 12214398 and 12214407.

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 7 ways as a sum of consecutive naturals, for example, 6925 + ... + 8507.

It is an arithmetic number, because the mean of its divisors is an integer number (1190112).

Almost surely, 2^12214428 is an apocalyptic number.

It is an amenable number.

12214428 is an abundant number, since it is smaller than the sum of its proper divisors (16348260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12214428 is a wasteful number, since it uses less digits than its factorization.

12214428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233 (or 2231 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The square root of 12214428 is about 3494.9145912311. The cubic root of 12214428 is about 230.2984657025.

Adding to 12214428 its reverse (82441221), we get a palindrome (94655649).

The spelling of 12214428 in words is "twelve million, two hundred fourteen thousand, four hundred twenty-eight".