12344220 has 144 divisors (see below), whose sum is σ = 43662528. Its totient is φ = 2764800.

The previous prime is 12344201. The next prime is 12344237. The reversal of 12344220 is 2244321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12344193 and 12344202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122170 + ... + 122270.

It is an arithmetic number, because the mean of its divisors is an integer number (303212).

Almost surely, 2^12344220 is an apocalyptic number.

12344220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12344220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21831264).

12344220 is an abundant number, since it is smaller than the sum of its proper divisors (31318308).

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

12344220 is a wasteful number, since it uses less digits than its factorization.

12344220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12344220 is about 3513.4342174004. The cubic root of 12344220 is about 231.1113198209. Note that the first 3 decimals are identical.

Adding to 12344220 its reverse (2244321), we get a palindrome (14588541).

The spelling of 12344220 in words is "twelve million, three hundred forty-four thousand, two hundred twenty".