9897844 has 12 divisors (see below), whose sum is σ = 18895968. Its totient is φ = 4499000.

The previous prime is 9897829. The next prime is 9897847. The reversal of 9897844 is 4487989.

9897844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897847) 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, 112432 + ... + 112519.

It is an arithmetic number, because the mean of its divisors is an integer number (1574664).

Almost surely, 2^9897844 is an apocalyptic number.

It is an amenable number.

9897844 is a deficient number, since it is larger than the sum of its proper divisors (8998124).

9897844 is a wasteful number, since it uses less digits than its factorization.

9897844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224966 (or 224964 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 9897844 is about 3146.0839149648. The cubic root of 9897844 is about 214.7073284770.

The spelling of 9897844 in words is "nine million, eight hundred ninety-seven thousand, eight hundred forty-four".