9639644 has 12 divisors (see below), whose sum is σ = 19279344. Its totient is φ = 4131264.

The previous prime is 9639601. The next prime is 9639649. The reversal of 9639644 is 4469369.

9639644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

9639644 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9639649) 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, 172109 + ... + 172164.

It is an arithmetic number, because the mean of its divisors is an integer number (1606612).

Almost surely, 2^9639644 is an apocalyptic number.

It is an amenable number.

9639644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

9639644 is a wasteful number, since it uses less digits than its factorization.

9639644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344284 (or 344282 counting only the distinct ones).

The product of its digits is 139968, while the sum is 41.

The square root of 9639644 is about 3104.7776087830. Note that the first 3 decimals coincide. The cubic root of 9639644 is about 212.8238678545.

It can be divided in two parts, 96396 and 44, that multiplied together give a palindrome (4241424).

The spelling of 9639644 in words is "nine million, six hundred thirty-nine thousand, six hundred forty-four".