9888866 has 24 divisors (see below), whose sum is σ = 17016804. Its totient is φ = 4293120.

The previous prime is 9888863. The next prime is 9888871. The reversal of 9888866 is 6688889.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3783025 + 6105841 = 1945^2 + 2471^2 .

It is a Curzon number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9888863) by changing a digit.

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, 4886 + ... + 6606.

Almost surely, 2^9888866 is an apocalyptic number.

9888866 is a deficient number, since it is larger than the sum of its proper divisors (7127938).

9888866 is a wasteful number, since it uses less digits than its factorization.

9888866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1753 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 53.

The square root of 9888866 is about 3144.6567380240. The cubic root of 9888866 is about 214.6423909168.

The spelling of 9888866 in words is "nine million, eight hundred eighty-eight thousand, eight hundred sixty-six".