28605120012 has 36 divisors (see below), whose sum is σ = 82637014096. Its totient is φ = 8172891360.

The previous prime is 28605119999. The next prime is 28605120013. The reversal of 28605120012 is 21002150682.

It is a happy number.

28605120012 is a `hidden beast` number, since 28 + 605 + 1 + 20 + 0 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (28605120013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56755939 + ... + 56756442.

Almost surely, 2^28605120012 is an apocalyptic number.

It is an amenable number.

28605120012 is an abundant number, since it is smaller than the sum of its proper divisors (54031894084).

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

28605120012 is a wasteful number, since it uses less digits than its factorization.

28605120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113512398 (or 113512393 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 28605120012 its reverse (21002150682), we get a palindrome (49607270694).

The spelling of 28605120012 in words is "twenty-eight billion, six hundred five million, one hundred twenty thousand, twelve".