9887664 has 20 divisors (see below), whose sum is σ = 25543256. Its totient is φ = 3295872.

The previous prime is 9887663. The next prime is 9887681. The reversal of 9887664 is 4667889.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 205993 = 9887664 / (9 + 8 + 8 + 7 + 6 + 6 + 4).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9887663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102949 + ... + 103044.

Almost surely, 2^9887664 is an apocalyptic number.

It is an amenable number.

9887664 is an abundant number, since it is smaller than the sum of its proper divisors (15655592).

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

9887664 is a wasteful number, since it uses less digits than its factorization.

9887664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206004 (or 205998 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 9887664 is about 3144.4656143771. The cubic root of 9887664 is about 214.6336939099.

The spelling of 9887664 in words is "nine million, eight hundred eighty-seven thousand, six hundred sixty-four".