7228388 has 6 divisors (see below), whose sum is σ = 12649686. Its totient is φ = 3614192.

The previous prime is 7228373. The next prime is 7228391. The reversal of 7228388 is 8838227.

It can be written as a sum of positive squares in only one way, i.e., 7139584 + 88804 = 2672^2 + 298^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 903545 + ... + 903552.

It is an arithmetic number, because the mean of its divisors is an integer number (2108281).

Almost surely, 2^7228388 is an apocalyptic number.

It is an amenable number.

7228388 is a deficient number, since it is larger than the sum of its proper divisors (5421298).

7228388 is a wasteful number, since it uses less digits than its factorization.

7228388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807101 (or 1807099 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 7228388 is about 2688.5661606142. The cubic root of 7228388 is about 193.3513247889.

The spelling of 7228388 in words is "seven million, two hundred twenty-eight thousand, three hundred eighty-eight".