7221684 has 12 divisors (see below), whose sum is σ = 16850624. Its totient is φ = 2407224.

The previous prime is 7221661. The next prime is 7221689. The reversal of 7221684 is 4861227.

7221684 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300892 + ... + 300915.

Almost surely, 2^7221684 is an apocalyptic number.

It is an amenable number.

7221684 is an abundant number, since it is smaller than the sum of its proper divisors (9628940).

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

7221684 is a wasteful number, since it uses less digits than its factorization.

7221684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601814 (or 601812 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 7221684 is about 2687.3191101914. The cubic root of 7221684 is about 193.2915314565.

The spelling of 7221684 in words is "seven million, two hundred twenty-one thousand, six hundred eighty-four".