3928668281 has 2 divisors, whose sum is σ = 3928668282. Its totient is φ = 3928668280.

The previous prime is 3928668259. The next prime is 3928668319. The reversal of 3928668281 is 1828668293.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3928155625 + 512656 = 62675^2 + 716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3928668281 is a prime.

It is a super-2 number, since 2×3928668281² = 30868868924270989922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3928668241) 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, 1964334140 + 1964334141.

It is an arithmetic number, because the mean of its divisors is an integer number (1964334141).

Almost surely, 2^3928668281 is an apocalyptic number.

It is an amenable number.

3928668281 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928668281 is an equidigital number, since it uses as much as digits as its factorization.

3928668281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 53.

The square root of 3928668281 is about 62679.0896631404. The cubic root of 3928668281 is about 1577.9083952289.

The spelling of 3928668281 in words is "three billion, nine hundred twenty-eight million, six hundred sixty-eight thousand, two hundred eighty-one".