28280112 has 80 divisors (see below), whose sum is σ = 88422912. Its totient is φ = 7603200.

The previous prime is 28280107. The next prime is 28280117. The reversal of 28280112 is 21108282.

It is an interprime number because it is at equal distance from previous prime (28280107) and next prime (28280117).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (28280117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3237 + ... + 8187.

Almost surely, 2^28280112 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 28280112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44211456).

28280112 is an abundant number, since it is smaller than the sum of its proper divisors (60142800).

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

28280112 is a wasteful number, since it uses less digits than its factorization.

28280112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986 (or 4980 counting only the distinct ones).

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

The square root of 28280112 is about 5317.9048505967. The cubic root of 28280112 is about 304.6681403452.

Adding to 28280112 its reverse (21108282), we get a palindrome (49388394).

The spelling of 28280112 in words is "twenty-eight million, two hundred eighty thousand, one hundred twelve".