12224820 has 48 divisors (see below), whose sum is σ = 34751808. Its totient is φ = 3210240.

The previous prime is 12224791. The next prime is 12224831. The reversal of 12224820 is 2842221.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 2500 + ... + 5540.

It is an arithmetic number, because the mean of its divisors is an integer number (723996).

Almost surely, 2^12224820 is an apocalyptic number.

12224820 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 12224820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17375904).

12224820 is an abundant number, since it is smaller than the sum of its proper divisors (22526988).

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

12224820 is a wasteful number, since it uses less digits than its factorization.

12224820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120 (or 3118 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 12224820 is about 3496.4010067497. The cubic root of 12224820 is about 230.3637596115.

It can be divided in two parts, 122 and 24820, that added together give a palindrome (24942).

The spelling of 12224820 in words is "twelve million, two hundred twenty-four thousand, eight hundred twenty".