12821028 has 96 divisors (see below), whose sum is σ = 35223552. Its totient is φ = 3590400.

The previous prime is 12821027. The next prime is 12821047. The reversal of 12821028 is 82012821.

It is a junction number, because it is equal to n+sod(n) for n = 12820989 and 12821007.

It is not an unprimeable number, because it can be changed into a prime (12821021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124425 + ... + 124527.

It is an arithmetic number, because the mean of its divisors is an integer number (366912).

Almost surely, 2^12821028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12821028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17611776).

12821028 is an abundant number, since it is smaller than the sum of its proper divisors (22402524).

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

12821028 is a wasteful number, since it uses less digits than its factorization.

12821028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 12821028 is about 3580.6463103747. The cubic root of 12821028 is about 234.0494453186.

Adding to 12821028 its reverse (82012821), we get a palindrome (94833849).

The spelling of 12821028 in words is "twelve million, eight hundred twenty-one thousand, twenty-eight".