9897944 has 64 divisors (see below), whose sum is σ = 23146560. Its totient is φ = 3870720.

The previous prime is 9897941. The next prime is 9897971. The reversal of 9897944 is 4497989.

9897944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9897892 and 9897901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35084 + ... + 35364.

It is an arithmetic number, because the mean of its divisors is an integer number (361665).

Almost surely, 2^9897944 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 9897944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11573280).

9897944 is an abundant number, since it is smaller than the sum of its proper divisors (13248616).

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

9897944 is a wasteful number, since it uses less digits than its factorization.

9897944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 344 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 9897944 is about 3146.0998076984. The cubic root of 9897944 is about 214.7080515523.

The spelling of 9897944 in words is "nine million, eight hundred ninety-seven thousand, nine hundred forty-four".