28022412 has 48 divisors (see below), whose sum is σ = 73003392. Its totient is φ = 8292480.

The previous prime is 28022411. The next prime is 28022413. The reversal of 28022412 is 21422082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28022411) and next prime (28022413).

It is not an unprimeable number, because it can be changed into a prime (28022411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3208 + ... + 8144.

It is an arithmetic number, because the mean of its divisors is an integer number (1520904).

Almost surely, 2^28022412 is an apocalyptic number.

28022412 is a gapful number since it is divisible by the number (22) 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 28022412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36501696).

28022412 is an abundant number, since it is smaller than the sum of its proper divisors (44980980).

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

28022412 is a wasteful number, since it uses less digits than its factorization.

28022412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998 (or 4996 counting only the distinct ones).

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

The square root of 28022412 is about 5293.6199334671. The cubic root of 28022412 is about 303.7398946663.

Adding to 28022412 its reverse (21422082), we get a palindrome (49444494).

The spelling of 28022412 in words is "twenty-eight million, twenty-two thousand, four hundred twelve".