7221384 has 24 divisors (see below), whose sum is σ = 19558110. Its totient is φ = 2407104.

The previous prime is 7221373. The next prime is 7221391. The reversal of 7221384 is 4831227.

7221384 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4088484 + 3132900 = 2022^2 + 1770^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50077 + ... + 50220.

Almost surely, 2^7221384 is an apocalyptic number.

It is an amenable number.

7221384 is an abundant number, since it is smaller than the sum of its proper divisors (12336726).

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

7221384 is a wasteful number, since it uses less digits than its factorization.

7221384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100309 (or 100302 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 7221384 is about 2687.2632919013. The cubic root of 7221384 is about 193.2888548757.

The spelling of 7221384 in words is "seven million, two hundred twenty-one thousand, three hundred eighty-four".