9820720 has 160 divisors (see below), whose sum is σ = 29998080. Its totient is φ = 2903040.

The previous prime is 9820703. The next prime is 9820721. The reversal of 9820720 is 270289.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (9820721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138285 + ... + 138355.

It is an arithmetic number, because the mean of its divisors is an integer number (187488).

Almost surely, 2^9820720 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 9820720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14999040).

9820720 is an abundant number, since it is smaller than the sum of its proper divisors (20177360).

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

9820720 is a wasteful number, since it uses less digits than its factorization.

9820720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 9820720 is about 3133.8028017091. The cubic root of 9820720 is about 214.1482072304.

The spelling of 9820720 in words is "nine million, eight hundred twenty thousand, seven hundred twenty".