9897120 has 192 divisors, whose sum is σ = 36288000. Its totient is φ = 2515968.

The previous prime is 9897109. The next prime is 9897127. The reversal of 9897120 is 217989.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125241 + ... + 125319.

It is an arithmetic number, because the mean of its divisors is an integer number (189000).

Almost surely, 2^9897120 is an apocalyptic number.

9897120 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9897120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18144000).

9897120 is an abundant number, since it is smaller than the sum of its proper divisors (26390880).

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

9897120 is a wasteful number, since it uses less digits than its factorization.

9897120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 9897120 is about 3145.9688491783. The cubic root of 9897120 is about 214.7020932663.

The spelling of 9897120 in words is "nine million, eight hundred ninety-seven thousand, one hundred twenty".