7229720 has 32 divisors (see below), whose sum is σ = 16539120. Its totient is φ = 2843520.

The previous prime is 7229713. The next prime is 7229741. The reversal of 7229720 is 279227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959 + ... + 3921.

Almost surely, 2^7229720 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 7229720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8269560).

7229720 is an abundant number, since it is smaller than the sum of its proper divisors (9309400).

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

7229720 is a wasteful number, since it uses less digits than its factorization.

7229720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3035 (or 3031 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 7229720 is about 2688.8138648854. The cubic root of 7229720 is about 193.3632005647.

It can be divided in two parts, 72 and 29720, that added together give a palindrome (29792).

The spelling of 7229720 in words is "seven million, two hundred twenty-nine thousand, seven hundred twenty".