9681620 has 48 divisors (see below), whose sum is σ = 22861440. Its totient is φ = 3417216.

The previous prime is 9681613. The next prime is 9681629. The reversal of 9681620 is 261869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9681629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5171 + ... + 6789.

It is an arithmetic number, because the mean of its divisors is an integer number (476280).

Almost surely, 2^9681620 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 9681620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11430720).

9681620 is an abundant number, since it is smaller than the sum of its proper divisors (13179820).

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

9681620 is a wasteful number, since it uses less digits than its factorization.

9681620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 1662 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 9681620 is about 3111.5301701896. The cubic root of 9681620 is about 213.1323356407.

It can be divided in two parts, 9681 and 620, that added together give a palindrome (10301).

The spelling of 9681620 in words is "nine million, six hundred eighty-one thousand, six hundred twenty".