28082697857 has 2 divisors, whose sum is σ = 28082697858. Its totient is φ = 28082697856.

The previous prime is 28082697847. The next prime is 28082697869. The reversal of 28082697857 is 75879628082.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28081715776 + 982081 = 167576^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 28082697857 - 2⁶ = 28082697793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28082697857.

It is not a weakly prime, because it can be changed into another prime (28082697847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14041348928 + 14041348929.

It is an arithmetic number, because the mean of its divisors is an integer number (14041348929).

Almost surely, 2^28082697857 is an apocalyptic number.

It is an amenable number.

28082697857 is a deficient number, since it is larger than the sum of its proper divisors (1).

28082697857 is an equidigital number, since it uses as much as digits as its factorization.

28082697857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 28082697857 in words is "twenty-eight billion, eighty-two million, six hundred ninety-seven thousand, eight hundred fifty-seven".