12021828 has 96 divisors (see below), whose sum is σ = 35185920. Its totient is φ = 3110400.

The previous prime is 12021817. The next prime is 12021857. The reversal of 12021828 is 82812021.

It is a junction number, because it is equal to n+sod(n) for n = 12021798 and 12021807.

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 31 ways as a sum of consecutive naturals, for example, 110238 + ... + 110346.

It is an arithmetic number, because the mean of its divisors is an integer number (366520).

Almost surely, 2^12021828 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 12021828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17592960).

12021828 is an abundant number, since it is smaller than the sum of its proper divisors (23164092).

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

12021828 is a wasteful number, since it uses less digits than its factorization.

12021828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 235 counting only the distinct ones).

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

The square root of 12021828 is about 3467.2507841228. The cubic root of 12021828 is about 229.0815801075.

Adding to 12021828 its reverse (82812021), we get a palindrome (94833849).

The spelling of 12021828 in words is "twelve million, twenty-one thousand, eight hundred twenty-eight".