12806031028 has 18 divisors (see below), whose sum is σ = 26069420706. Its totient is φ = 5488298928.

The previous prime is 12806031013. The next prime is 12806031071. The reversal of 12806031028 is 82013060821.

It can be written as a sum of positive squares in only one way, i.e., 9500011024 + 3306020004 = 97468^2 + 57498^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32668251 + ... + 32668642.

Almost surely, 2^12806031028 is an apocalyptic number.

It is an amenable number.

12806031028 is an abundant number, since it is smaller than the sum of its proper divisors (13263389678).

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

12806031028 is a wasteful number, since it uses less digits than its factorization.

12806031028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65336911 (or 65336902 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

Adding to 12806031028 its reverse (82013060821), we get a palindrome (94819091849).

The spelling of 12806031028 in words is "twelve billion, eight hundred six million, thirty-one thousand, twenty-eight".