7220828 has 12 divisors (see below), whose sum is σ = 12693240. Its totient is φ = 3594192.

The previous prime is 7220821. The next prime is 7220849. The reversal of 7220828 is 8280227.

It is a self number, because there is not a number n which added to its sum of digits gives 7220828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220821) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3026 + ... + 4857.

It is an arithmetic number, because the mean of its divisors is an integer number (1057770).

Almost surely, 2^7220828 is an apocalyptic number.

It is an amenable number.

7220828 is a deficient number, since it is larger than the sum of its proper divisors (5472412).

7220828 is a wasteful number, since it uses less digits than its factorization.

7220828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8116 (or 8114 counting only the distinct ones).

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

The square root of 7220828 is about 2687.1598389378. The cubic root of 7220828 is about 193.2838940833.

The spelling of 7220828 in words is "seven million, two hundred twenty thousand, eight hundred twenty-eight".