8971866 has 24 divisors (see below), whose sum is σ = 19914804. Its totient is φ = 2917440.

The previous prime is 8971849. The next prime is 8971873. The reversal of 8971866 is 6681798.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6395841 + 2576025 = 2529^2 + 1605^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5341 + ... + 6816.

Almost surely, 2^8971866 is an apocalyptic number.

8971866 is an abundant number, since it is smaller than the sum of its proper divisors (10942938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8971866 is a wasteful number, since it uses less digits than its factorization.

8971866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12206 (or 12203 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 8971866 is about 2995.3073298077. The cubic root of 8971866 is about 207.7914113298.

The spelling of 8971866 in words is "eight million, nine hundred seventy-one thousand, eight hundred sixty-six".