7224020 has 18 divisors (see below), whose sum is σ = 15195726. Its totient is φ = 2884800.

The previous prime is 7223999. The next prime is 7224029. The reversal of 7224020 is 204227.

It can be written as a sum of positive squares in 3 ways, for example, as 2972176 + 4251844 = 1724^2 + 2062^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7224020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7224029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11720 + ... + 12320.

It is an arithmetic number, because the mean of its divisors is an integer number (844207).

Almost surely, 2^7224020 is an apocalyptic number.

It is an amenable number.

7224020 is an abundant number, since it is smaller than the sum of its proper divisors (7971706).

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

7224020 is an equidigital number, since it uses as much as digits as its factorization.

7224020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 7224020 is about 2687.7537089547. The cubic root of 7224020 is about 193.3123705637.

Adding to 7224020 its reverse (204227), we get a palindrome (7428247).

The spelling of 7224020 in words is "seven million, two hundred twenty-four thousand, twenty".