9886644 has 48 divisors (see below), whose sum is σ = 26467840. Its totient is φ = 3188160.

The previous prime is 9886637. The next prime is 9886649. The reversal of 9886644 is 4466889.

It is a happy number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9886644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9886649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1872 + ... + 4824.

Almost surely, 2^9886644 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 9886644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13233920).

9886644 is an abundant number, since it is smaller than the sum of its proper divisors (16581196).

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

9886644 is a wasteful number, since it uses less digits than its factorization.

9886644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997 (or 2989 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 9886644 is about 3144.3034204733. The cubic root of 9886644 is about 214.6263132014.

The spelling of 9886644 in words is "nine million, eight hundred eighty-six thousand, six hundred forty-four".