28288038257 has 2 divisors, whose sum is σ = 28288038258. Its totient is φ = 28288038256.

The previous prime is 28288038239. The next prime is 28288038269. The reversal of 28288038257 is 75283088282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20221124401 + 8066913856 = 142201^2 + 89816^2 .

It is a cyclic number.

It is not a de Polignac number, because 28288038257 - 2⁶ = 28288038193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28288038199 and 28288038208.

It is not a weakly prime, because it can be changed into another prime (28288037257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144019128 + 14144019129.

It is an arithmetic number, because the mean of its divisors is an integer number (14144019129).

Almost surely, 2^28288038257 is an apocalyptic number.

It is an amenable number.

28288038257 is a deficient number, since it is larger than the sum of its proper divisors (1).

28288038257 is an equidigital number, since it uses as much as digits as its factorization.

28288038257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3440640, while the sum is 53.

The spelling of 28288038257 in words is "twenty-eight billion, two hundred eighty-eight million, thirty-eight thousand, two hundred fifty-seven".