7322228 has 6 divisors (see below), whose sum is σ = 12813906. Its totient is φ = 3661112.

The previous prime is 7322221. The next prime is 7322233. The reversal of 7322228 is 8222237.

It can be written as a sum of positive squares in only one way, i.e., 7171684 + 150544 = 2678^2 + 388^2 .

It is an Ulam number.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 7322197 and 7322206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7322221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 915275 + ... + 915282.

It is an arithmetic number, because the mean of its divisors is an integer number (2135651).

Almost surely, 2^7322228 is an apocalyptic number.

It is an amenable number.

7322228 is a deficient number, since it is larger than the sum of its proper divisors (5491678).

7322228 is a wasteful number, since it uses less digits than its factorization.

7322228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830561 (or 1830559 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 7322228 is about 2705.9615666155. The cubic root of 7322228 is about 194.1844350820.

Subtracting 7322228 from its reverse (8222237), we obtain a palindrome (900009).

The spelling of 7322228 in words is "seven million, three hundred twenty-two thousand, two hundred twenty-eight".