28213112 has 16 divisors (see below), whose sum is σ = 53570400. Its totient is φ = 13927680.

The previous prime is 28213109. The next prime is 28213121. The reversal of 28213112 is 21131282.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21689 + ... + 22952.

It is an arithmetic number, because the mean of its divisors is an integer number (3348150).

Almost surely, 2^28213112 is an apocalyptic number.

It is an amenable number.

28213112 is a deficient number, since it is larger than the sum of its proper divisors (25357288).

28213112 is a wasteful number, since it uses less digits than its factorization.

28213112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44726 (or 44722 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 28213112 is about 5311.6016416896. The cubic root of 28213112 is about 304.4273479585.

Adding to 28213112 its reverse (21131282), we get a palindrome (49344394).

The spelling of 28213112 in words is "twenty-eight million, two hundred thirteen thousand, one hundred twelve".