3128866 has 12 divisors (see below), whose sum is σ = 5082642. Its totient is φ = 1443936.

The previous prime is 3128849. The next prime is 3128869. The reversal of 3128866 is 6688213.

It can be written as a sum of positive squares in 3 ways, for example, as 772641 + 2356225 = 879^2 + 1535^2 .

It is not an unprimeable number, because it can be changed into a prime (3128869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4291 + ... + 4966.

Almost surely, 2^3128866 is an apocalyptic number.

3128866 is a deficient number, since it is larger than the sum of its proper divisors (1953776).

3128866 is a wasteful number, since it uses less digits than its factorization.

3128866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9285 (or 9272 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 3128866 is about 1768.8600849134. The cubic root of 3128866 is about 146.2611514131.

The spelling of 3128866 in words is "three million, one hundred twenty-eight thousand, eight hundred sixty-six".