9971680 has 24 divisors (see below), whose sum is σ = 23558472. Its totient is φ = 3988608.

The previous prime is 9971653. The next prime is 9971681. The reversal of 9971680 is 861799.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9971681) 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, 31002 + ... + 31321.

It is an arithmetic number, because the mean of its divisors is an integer number (981603).

Almost surely, 2^9971680 is an apocalyptic number.

It is an amenable number.

9971680 is an abundant number, since it is smaller than the sum of its proper divisors (13586792).

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

9971680 is a wasteful number, since it uses less digits than its factorization.

9971680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62338 (or 62330 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 9971680 is about 3157.7967002326. The cubic root of 9971680 is about 215.2398980764.

The spelling of 9971680 in words is "nine million, nine hundred seventy-one thousand, six hundred eighty".