28140713 has 2 divisors, whose sum is σ = 28140714. Its totient is φ = 28140712.

The previous prime is 28140709. The next prime is 28140731. The reversal of 28140713 is 31704182.

Together with next prime (28140731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27741289 + 399424 = 5267^2 + 632^2 .

It is a cyclic number.

It is not a de Polignac number, because 28140713 - 2² = 28140709 is a prime.

It is not a weakly prime, because it can be changed into another prime (28140743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14070356 + 14070357.

It is an arithmetic number, because the mean of its divisors is an integer number (14070357).

Almost surely, 2^28140713 is an apocalyptic number.

It is an amenable number.

28140713 is a deficient number, since it is larger than the sum of its proper divisors (1).

28140713 is an equidigital number, since it uses as much as digits as its factorization.

28140713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 28140713 is about 5304.7820878901. The cubic root of 28140713 is about 304.1667230958.

Adding to 28140713 its reverse (31704182), we get a palindrome (59844895).

The spelling of 28140713 in words is "twenty-eight million, one hundred forty thousand, seven hundred thirteen".