28302726642813 has 64 divisors (see below), whose sum is σ = 50443644160000. Its totient is φ = 15321296748672.

The previous prime is 28302726642791. The next prime is 28302726642823. The reversal of 28302726642813 is 31824662720382.

28302726642813 is a `hidden beast` number, since 2 + 8 + 30 + 272 + 6 + 64 + 281 + 3 = 666.

It is not a de Polignac number, because 28302726642813 - 2¹² = 28302726638717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28302726642813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28302726642823) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 135121638 + ... + 135330936.

It is an arithmetic number, because the mean of its divisors is an integer number (788181940000).

Almost surely, 2^{28302726642813} is an apocalyptic number.

It is an amenable number.

28302726642813 is a deficient number, since it is larger than the sum of its proper divisors (22140917517187).

28302726642813 is a wasteful number, since it uses less digits than its factorization.

28302726642813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246991 (or 246985 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 28302726642813 in words is "twenty-eight trillion, three hundred two billion, seven hundred twenty-six million, six hundred forty-two thousand, eight hundred thirteen".