28107745812 has 36 divisors (see below), whose sum is σ = 71520679776. Its totient is φ = 9307198800.

The previous prime is 28107745807. The next prime is 28107745847. The reversal of 28107745812 is 21854770182.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2579898 + ... + 2590769.

Almost surely, 2^28107745812 is an apocalyptic number.

It is an amenable number.

28107745812 is an abundant number, since it is smaller than the sum of its proper divisors (43412933964).

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

28107745812 is a wasteful number, since it uses less digits than its factorization.

28107745812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5170828 (or 5170823 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 28107745812 in words is "twenty-eight billion, one hundred seven million, seven hundred forty-five thousand, eight hundred twelve".