28918012 has 12 divisors (see below), whose sum is σ = 50646456. Its totient is φ = 14447600.

The previous prime is 28917953. The next prime is 28918031. The reversal of 28918012 is 21081982.

It is a happy number.

It is a congruent number.

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, 5703 + ... + 9505.

It is an arithmetic number, because the mean of its divisors is an integer number (4220538).

Almost surely, 2^28918012 is an apocalyptic number.

It is an amenable number.

28918012 is a deficient number, since it is larger than the sum of its proper divisors (21728444).

28918012 is a wasteful number, since it uses less digits than its factorization.

28918012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708 (or 5706 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 28918012 is about 5377.5470244341. The cubic root of 28918012 is about 306.9418769741.

Adding to 28918012 its reverse (21081982), we get a palindrome (49999994).

The spelling of 28918012 in words is "twenty-eight million, nine hundred eighteen thousand, twelve".