9870866 has 8 divisors (see below), whose sum is σ = 14836284. Its totient is φ = 4925440.

The previous prime is 9870859. The next prime is 9870871. The reversal of 9870866 is 6680789.

It can be written as a sum of positive squares in 2 ways, for example, as 9480241 + 390625 = 3079^2 + 625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 3695 + ... + 5778.

Almost surely, 2^9870866 is an apocalyptic number.

9870866 is a deficient number, since it is larger than the sum of its proper divisors (4965418).

9870866 is a wasteful number, since it uses less digits than its factorization.

9870866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9996.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 9870866 is about 3141.7934368765. The cubic root of 9870866 is about 214.5120790556.

The spelling of 9870866 in words is "nine million, eight hundred seventy thousand, eight hundred sixty-six".