12220340 has 24 divisors (see below), whose sum is σ = 27996192. Its totient is φ = 4443680.

The previous prime is 12220333. The next prime is 12220361. The reversal of 12220340 is 4302221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27554 + ... + 27993.

It is an arithmetic number, because the mean of its divisors is an integer number (1166508).

Almost surely, 2^12220340 is an apocalyptic number.

12220340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220340 is an abundant number, since it is smaller than the sum of its proper divisors (15775852).

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

12220340 is a wasteful number, since it uses less digits than its factorization.

12220340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55567 (or 55565 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 12220340 is about 3495.7602892647. The cubic root of 12220340 is about 230.3356158914.

Adding to 12220340 its reverse (4302221), we get a palindrome (16522561).

The spelling of 12220340 in words is "twelve million, two hundred twenty thousand, three hundred forty".