9872866 has 4 divisors (see below), whose sum is σ = 14809302. Its totient is φ = 4936432.

The previous prime is 9872839. The next prime is 9872887. The reversal of 9872866 is 6682789.

9872866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7535025 + 2337841 = 2745^2 + 1529^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2468215 + ... + 2468218.

Almost surely, 2^9872866 is an apocalyptic number.

9872866 is a deficient number, since it is larger than the sum of its proper divisors (4936436).

9872866 is a wasteful number, since it uses less digits than its factorization.

9872866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4936435.

The product of its digits is 290304, while the sum is 46.

The square root of 9872866 is about 3142.1117102993. Note that the first 3 decimals coincide. The cubic root of 9872866 is about 214.5265659705.

The spelling of 9872866 in words is "nine million, eight hundred seventy-two thousand, eight hundred sixty-six".