28338882857 has 2 divisors, whose sum is σ = 28338882858. Its totient is φ = 28338882856.

The previous prime is 28338882839. The next prime is 28338882863. The reversal of 28338882857 is 75828883382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20429270761 + 7909612096 = 142931^2 + 88936^2 .

It is a cyclic number.

It is not a de Polignac number, because 28338882857 - 2²² = 28334688553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28338882857.

It is not a weakly prime, because it can be changed into another prime (28338882827) 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, 14169441428 + 14169441429.

It is an arithmetic number, because the mean of its divisors is an integer number (14169441429).

Almost surely, 2^28338882857 is an apocalyptic number.

It is an amenable number.

28338882857 is a deficient number, since it is larger than the sum of its proper divisors (1).

28338882857 is an equidigital number, since it uses as much as digits as its factorization.

28338882857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41287680, while the sum is 62.

The spelling of 28338882857 in words is "twenty-eight billion, three hundred thirty-eight million, eight hundred eighty-two thousand, eight hundred fifty-seven".