7320720 has 160 divisors (see below), whose sum is σ = 25712640. Its totient is φ = 1707520.

The previous prime is 7320701. The next prime is 7320721. The reversal of 7320720 is 270237.

7320720 is digitally balanced in base 4, 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 (7320721) 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, 124051 + ... + 124109.

It is an arithmetic number, because the mean of its divisors is an integer number (160704).

Almost surely, 2^7320720 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 7320720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12856320).

7320720 is an abundant number, since it is smaller than the sum of its proper divisors (18391920).

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

7320720 is a wasteful number, since it uses less digits than its factorization.

7320720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 21.

The square root of 7320720 is about 2705.6829082507. The cubic root of 7320720 is about 194.1711035190.

Adding to 7320720 its reverse (270237), we get a palindrome (7590957).

The spelling of 7320720 in words is "seven million, three hundred twenty thousand, seven hundred twenty".