7229520 has 80 divisors (see below), whose sum is σ = 24909120. Its totient is φ = 1927296.

The previous prime is 7229513. The next prime is 7229531. The reversal of 7229520 is 259227.

It is a happy number.

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

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487 + ... + 3833.

It is an arithmetic number, because the mean of its divisors is an integer number (311364).

Almost surely, 2^7229520 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 7229520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12454560).

7229520 is an abundant number, since it is smaller than the sum of its proper divisors (17679600).

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

7229520 is a wasteful number, since it uses less digits than its factorization.

7229520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369 (or 3357 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 7229520 is about 2688.7766735079. The cubic root of 7229520 is about 193.3614175083.

It can be divided in two parts, 72 and 29520, that added together give a palindrome (29592).

The spelling of 7229520 in words is "seven million, two hundred twenty-nine thousand, five hundred twenty".