12323220 has 192 divisors, whose sum is σ = 44330496. Its totient is φ = 2488320.

The previous prime is 12323219. The next prime is 12323221. The reversal of 12323220 is 2232321.

It is an interprime number because it is at equal distance from previous prime (12323219) and next prime (12323221).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12323220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12323221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 201990 + ... + 202050.

It is an arithmetic number, because the mean of its divisors is an integer number (230888).

Almost surely, 2^12323220 is an apocalyptic number.

12323220 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 12323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22165248).

12323220 is an abundant number, since it is smaller than the sum of its proper divisors (32007276).

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

12323220 is a wasteful number, since it uses less digits than its factorization.

12323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 12323220 is about 3510.4444163097. Note that the first 4 decimals coincide. The cubic root of 12323220 is about 230.9801898268.

Adding to 12323220 its reverse (2232321), we get a palindrome (14555541).

The spelling of 12323220 in words is "twelve million, three hundred twenty-three thousand, two hundred twenty".