9887864 has 32 divisors (see below), whose sum is σ = 21293280. Its totient is φ = 4216704.

The previous prime is 9887851. The next prime is 9887881. The reversal of 9887864 is 4687889.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 17474 + ... + 18030.

It is an arithmetic number, because the mean of its divisors is an integer number (665415).

Almost surely, 2^9887864 is an apocalyptic number.

It is an amenable number.

9887864 is an abundant number, since it is smaller than the sum of its proper divisors (11405416).

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

9887864 is a wasteful number, since it uses less digits than its factorization.

9887864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 883 counting only the distinct ones).

The product of its digits is 774144, while the sum is 50.

The square root of 9887864 is about 3144.4974161223. The cubic root of 9887864 is about 214.6351410481.

The spelling of 9887864 in words is "nine million, eight hundred eighty-seven thousand, eight hundred sixty-four".