9822720 has 80 divisors (see below), whose sum is σ = 31426560. Its totient is φ = 2617344.

The previous prime is 9822653. The next prime is 9822721. The reversal of 9822720 is 272289.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (9822721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7041 + ... + 8319.

It is an arithmetic number, because the mean of its divisors is an integer number (392832).

Almost surely, 2^9822720 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 9822720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15713280).

9822720 is an abundant number, since it is smaller than the sum of its proper divisors (21603840).

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

9822720 is a wasteful number, since it uses less digits than its factorization.

9822720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1289 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 9822720 is about 3134.1218865896. The cubic root of 9822720 is about 214.1627434132.

The spelling of 9822720 in words is "nine million, eight hundred twenty-two thousand, seven hundred twenty".