9887964 has 12 divisors (see below), whose sum is σ = 23071944. Its totient is φ = 3295984.

The previous prime is 9887939. The next prime is 9887971. The reversal of 9887964 is 4697889.

It is a happy number.

9887964 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411987 + ... + 412010.

It is an arithmetic number, because the mean of its divisors is an integer number (1922662).

Almost surely, 2^9887964 is an apocalyptic number.

It is an amenable number.

9887964 is an abundant number, since it is smaller than the sum of its proper divisors (13183980).

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

9887964 is a wasteful number, since it uses less digits than its factorization.

9887964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824004 (or 824002 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 9887964 is about 3144.5133168743. The cubic root of 9887964 is about 214.6358646099.

The spelling of 9887964 in words is "nine million, eight hundred eighty-seven thousand, nine hundred sixty-four".