7228656 has 80 divisors (see below), whose sum is σ = 21501600. Its totient is φ = 2322432.

The previous prime is 7228651. The next prime is 7228657. The reversal of 7228656 is 6568227.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 7228656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7228651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12240 + ... + 12816.

It is an arithmetic number, because the mean of its divisors is an integer number (268770).

Almost surely, 2^7228656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7228656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10750800).

7228656 is an abundant number, since it is smaller than the sum of its proper divisors (14272944).

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

7228656 is a wasteful number, since it uses less digits than its factorization.

7228656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 611 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 7228656 is about 2688.6160008450. The cubic root of 7228656 is about 193.3537143265.

The spelling of 7228656 in words is "seven million, two hundred twenty-eight thousand, six hundred fifty-six".