9987764 has 12 divisors (see below), whose sum is σ = 17905188. Its totient is φ = 4872000.

The previous prime is 9987737. The next prime is 9987793. The reversal of 9987764 is 4677899.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 128164 + 9859600 = 358^2 + 3140^2 .

It is a nialpdrome in base 10.

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 3 ways as a sum of consecutive naturals, for example, 30287 + ... + 30614.

It is an arithmetic number, because the mean of its divisors is an integer number (1492099).

Almost surely, 2^9987764 is an apocalyptic number.

It is an amenable number.

9987764 is a deficient number, since it is larger than the sum of its proper divisors (7917424).

9987764 is a wasteful number, since it uses less digits than its factorization.

9987764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60946 (or 60944 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 9987764 is about 3160.3423865145. The cubic root of 9987764 is about 215.3555609291.

The spelling of 9987764 in words is "nine million, nine hundred eighty-seven thousand, seven hundred sixty-four".