9939680 has 96 divisors (see below), whose sum is σ = 25510464. Its totient is φ = 3649536.

The previous prime is 9939667. The next prime is 9939707. The reversal of 9939680 is 869399.

9939680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136124 + ... + 136196.

It is an arithmetic number, because the mean of its divisors is an integer number (265734).

Almost surely, 2^9939680 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 9939680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12755232).

9939680 is an abundant number, since it is smaller than the sum of its proper divisors (15570784).

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

9939680 is a wasteful number, since it uses less digits than its factorization.

9939680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 9939680 is about 3152.7258047601. The cubic root of 9939680 is about 215.0094100803.

The spelling of 9939680 in words is "nine million, nine hundred thirty-nine thousand, six hundred eighty".