28112012 has 12 divisors (see below), whose sum is σ = 49239960. Its totient is φ = 14043456.

The previous prime is 28112011. The next prime is 28112023. The reversal of 28112012 is 21021182.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28112011) 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 3 ways as a sum of consecutive naturals, for example, 3428 + ... + 8244.

It is an arithmetic number, because the mean of its divisors is an integer number (4103330).

Almost surely, 2^28112012 is an apocalyptic number.

It is an amenable number.

28112012 is a deficient number, since it is larger than the sum of its proper divisors (21127948).

28112012 is a wasteful number, since it uses less digits than its factorization.

28112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6280 (or 6278 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 28112012 is about 5302.0761971137. The cubic root of 28112012 is about 304.0632803401.

Adding to 28112012 its reverse (21021182), we get a palindrome (49133194).

The spelling of 28112012 in words is "twenty-eight million, one hundred twelve thousand, twelve".