28104112 has 20 divisors (see below), whose sum is σ = 55719400. Its totient is φ = 13724928.

The previous prime is 28104107. The next prime is 28104121. The reversal of 28104112 is 21140182.

It is a happy number.

It is a super-2 number, since 2×28104112² = 1579682222617088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28104112.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19737 + ... + 21112.

It is an arithmetic number, because the mean of its divisors is an integer number (2785970).

Almost surely, 2^28104112 is an apocalyptic number.

It is an amenable number.

28104112 is a deficient number, since it is larger than the sum of its proper divisors (27615288).

28104112 is a wasteful number, since it uses less digits than its factorization.

28104112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40900 (or 40894 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 28104112 is about 5301.3311535877. The cubic root of 28104112 is about 304.0347951862.

Adding to 28104112 its reverse (21140182), we get a palindrome (49244294).

The spelling of 28104112 in words is "twenty-eight million, one hundred four thousand, one hundred twelve".