2028711257 has 2 divisors, whose sum is σ = 2028711258. Its totient is φ = 2028711256.

The previous prime is 2028711241. The next prime is 2028711277. The reversal of 2028711257 is 7521178202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1944457216 + 84254041 = 44096^2 + 9179^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028711257 - 2⁴ = 2028711241 is a prime.

It is not a weakly prime, because it can be changed into another prime (2028711277) 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, 1014355628 + 1014355629.

It is an arithmetic number, because the mean of its divisors is an integer number (1014355629).

Almost surely, 2^2028711257 is an apocalyptic number.

It is an amenable number.

2028711257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028711257 is an equidigital number, since it uses as much as digits as its factorization.

2028711257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 2028711257 is about 45041.2173125905. The cubic root of 2028711257 is about 1265.9214140196.

Adding to 2028711257 its reverse (7521178202), we get a palindrome (9549889459).

The spelling of 2028711257 in words is "two billion, twenty-eight million, seven hundred eleven thousand, two hundred fifty-seven".