28748722335857 has 2 divisors, whose sum is σ = 28748722335858. Its totient is φ = 28748722335856.

The previous prime is 28748722335793. The next prime is 28748722335881. The reversal of 28748722335857 is 75853322784782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15949471955041 + 12799250380816 = 3993679^2 + 3577604^2 .

It is a cyclic number.

It is not a de Polignac number, because 28748722335857 - 2⁶ = 28748722335793 is a prime.

It is not a weakly prime, because it can be changed into another prime (28748722335457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14374361167928 + 14374361167929.

It is an arithmetic number, because the mean of its divisors is an integer number (14374361167929).

Almost surely, 2^{28748722335857} is an apocalyptic number.

It is an amenable number.

28748722335857 is a deficient number, since it is larger than the sum of its proper divisors (1).

28748722335857 is an equidigital number, since it uses as much as digits as its factorization.

28748722335857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1264435200, while the sum is 71.

The spelling of 28748722335857 in words is "twenty-eight trillion, seven hundred forty-eight billion, seven hundred twenty-two million, three hundred thirty-five thousand, eight hundred fifty-seven".