7220444 has 72 divisors (see below), whose sum is σ = 17064432. Its totient is φ = 2634240.

The previous prime is 7220443. The next prime is 7220453. The reversal of 7220444 is 4440227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220441) 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 23 ways as a sum of consecutive naturals, for example, 36554 + ... + 36750.

It is an arithmetic number, because the mean of its divisors is an integer number (237006).

Almost surely, 2^7220444 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 7220444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8532216).

7220444 is an abundant number, since it is smaller than the sum of its proper divisors (9843988).

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

7220444 is a wasteful number, since it uses less digits than its factorization.

7220444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 7220444 is about 2687.0883870837. The cubic root of 7220444 is about 193.2804677758.

The spelling of 7220444 in words is "seven million, two hundred twenty thousand, four hundred forty-four".