9897680 has 80 divisors (see below), whose sum is σ = 25665024. Its totient is φ = 3525120.

The previous prime is 9897661. The next prime is 9897703. The reversal of 9897680 is 867989.

It is a tau number, because it is divible by the number of its divisors (80).

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, 32087 + ... + 32393.

Almost surely, 2^9897680 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 9897680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12832512).

9897680 is an abundant number, since it is smaller than the sum of its proper divisors (15767344).

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

9897680 is a wasteful number, since it uses less digits than its factorization.

9897680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 9897680 is about 3146.0578507078. The cubic root of 9897680 is about 214.7061426229.

The spelling of 9897680 in words is "nine million, eight hundred ninety-seven thousand, six hundred eighty".