28022112 has 120 divisors (see below), whose sum is σ = 86902200. Its totient is φ = 8833536.

The previous prime is 28022101. The next prime is 28022143. The reversal of 28022112 is 21122082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 48964 + ... + 49532.

It is an arithmetic number, because the mean of its divisors is an integer number (724185).

Almost surely, 2^28022112 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 28022112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43451100).

28022112 is an abundant number, since it is smaller than the sum of its proper divisors (58880088).

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

28022112 is a wasteful number, since it uses less digits than its factorization.

28022112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 28022112 is about 5293.5915973940. The cubic root of 28022112 is about 303.7388107447.

Adding to 28022112 its reverse (21122082), we get a palindrome (49144194).

The spelling of 28022112 in words is "twenty-eight million, twenty-two thousand, one hundred twelve".