822728 has 8 divisors (see below), whose sum is σ = 1542630. Its totient is φ = 411360.

The previous prime is 822727. The next prime is 822739. The reversal of 822728 is 827228.

It can be written as a sum of positive squares in only one way, i.e., 465124 + 357604 = 682^2 + 598^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 822728.

It is not an unprimeable number, because it can be changed into a prime (822721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51413 + ... + 51428.

2⁸²²⁷²⁸ is an apocalyptic number.

It is an amenable number.

822728 is a deficient number, since it is larger than the sum of its proper divisors (719902).

822728 is a wasteful number, since it uses less digits than its factorization.

822728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102847 (or 102843 counting only the distinct ones).

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

The square root of 822728 is about 907.0435491199. The cubic root of 822728 is about 93.7026973221.

The spelling of 822728 in words is "eight hundred twenty-two thousand, seven hundred twenty-eight".