28012731712012 has 24 divisors (see below), whose sum is σ = 51154153297632. Its totient is φ = 13397270515200.

The previous prime is 28012731711983. The next prime is 28012731712051. The reversal of 28012731712012 is 21021713721082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9113212 + ... + 11793052.

It is an arithmetic number, because the mean of its divisors is an integer number (2131423054068).

Almost surely, 2^{28012731712012} is an apocalyptic number.

It is an amenable number.

28012731712012 is a deficient number, since it is larger than the sum of its proper divisors (23141421585620).

28012731712012 is a wasteful number, since it uses less digits than its factorization.

28012731712012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793489 (or 2793487 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The spelling of 28012731712012 in words is "twenty-eight trillion, twelve billion, seven hundred thirty-one million, seven hundred twelve thousand, twelve".