9987648 has 56 divisors (see below), whose sum is σ = 28834080. Its totient is φ = 3025920.

The previous prime is 9987643. The next prime is 9987671. The reversal of 9987648 is 8467899.

It is a happy number.

It is a super-2 number, since 2×9987648² = 199506225143808, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 9987648.

It is not an unprimeable number, because it can be changed into a prime (9987643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253 + ... + 4476.

Almost surely, 2^9987648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9987648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14417040).

9987648 is an abundant number, since it is smaller than the sum of its proper divisors (18846432).

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

9987648 is a wasteful number, since it uses less digits than its factorization.

9987648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755 (or 4745 counting only the distinct ones).

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

The square root of 9987648 is about 3160.3240340193. The cubic root of 9987648 is about 215.3547271976.

It can be divided in two parts, 998 and 7648, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 9987648 in words is "nine million, nine hundred eighty-seven thousand, six hundred forty-eight".