7220784 has 40 divisors (see below), whose sum is σ = 19753200. Its totient is φ = 2265088.

The previous prime is 7220761. The next prime is 7220789. The reversal of 7220784 is 4870227.

It is not an unprimeable number, because it can be changed into a prime (7220789) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3609 + ... + 5240.

It is an arithmetic number, because the mean of its divisors is an integer number (493830).

Almost surely, 2^7220784 is an apocalyptic number.

It is an amenable number.

7220784 is an abundant number, since it is smaller than the sum of its proper divisors (12532416).

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

7220784 is a wasteful number, since it uses less digits than its factorization.

7220784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8877 (or 8871 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 7220784 is about 2687.1516518425. The cubic root of 7220784 is about 193.2835014917.

The spelling of 7220784 in words is "seven million, two hundred twenty thousand, seven hundred eighty-four".