7228240 has 20 divisors (see below), whose sum is σ = 16805844. Its totient is φ = 2891264.

The previous prime is 7228237. The next prime is 7228253. The reversal of 7228240 is 428227.

It can be written as a sum of positive squares in 2 ways, for example, as 817216 + 6411024 = 904^2 + 2532^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45097 + ... + 45256.

Almost surely, 2^7228240 is an apocalyptic number.

It is an amenable number.

7228240 is an abundant number, since it is smaller than the sum of its proper divisors (9577604).

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

7228240 is a wasteful number, since it uses less digits than its factorization.

7228240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90366 (or 90360 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 7228240 is about 2688.5386365087. The cubic root of 7228240 is about 193.3500051682.

The spelling of 7228240 in words is "seven million, two hundred twenty-eight thousand, two hundred forty".