3128316866 has 4 divisors (see below), whose sum is σ = 4692475302. Its totient is φ = 1564158432.

The previous prime is 3128316859. The next prime is 3128316869. The reversal of 3128316866 is 6686138213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6686138213 = 131 ⋅51039223.

It can be written as a sum of positive squares in only one way, i.e., 1642599841 + 1485717025 = 40529^2 + 38545^2 .

It is not an unprimeable number, because it can be changed into a prime (3128316869) 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, 782079215 + ... + 782079218.

Almost surely, 2^3128316866 is an apocalyptic number.

3128316866 is a deficient number, since it is larger than the sum of its proper divisors (1564158436).

3128316866 is a wasteful number, since it uses less digits than its factorization.

3128316866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564158435.

The product of its digits is 248832, while the sum is 44.

The square root of 3128316866 is about 55931.3585209585. The cubic root of 3128316866 is about 1462.5259435435.

The spelling of 3128316866 in words is "three billion, one hundred twenty-eight million, three hundred sixteen thousand, eight hundred sixty-six".