7280228 has 12 divisors (see below), whose sum is σ = 12949692. Its totient is φ = 3580320.

The previous prime is 7280197. The next prime is 7280263. The reversal of 7280228 is 8220827.

It can be written as a sum of positive squares in 2 ways, for example, as 268324 + 7011904 = 518^2 + 2648^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7280228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14675 + ... + 15162.

It is an arithmetic number, because the mean of its divisors is an integer number (1079141).

Almost surely, 2^7280228 is an apocalyptic number.

It is an amenable number.

7280228 is a deficient number, since it is larger than the sum of its proper divisors (5669464).

7280228 is a wasteful number, since it uses less digits than its factorization.

7280228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29902 (or 29900 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 7280228 is about 2698.1897635267. The cubic root of 7280228 is about 193.8124449432.

The spelling of 7280228 in words is "seven million, two hundred eighty thousand, two hundred twenty-eight".