8222728 has 8 divisors (see below), whose sum is σ = 15417630. Its totient is φ = 4111360.

The previous prime is 8222717. The next prime is 8222737. The reversal of 8222728 is 8272228.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8191044 + 31684 = 2862^2 + 178^2 .

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

It is a super-2 number, since 2×8222728² = 135226511523968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8222728.

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 as a sum of consecutive naturals, namely, 513913 + ... + 513928.

Almost surely, 2^8222728 is an apocalyptic number.

It is an amenable number.

8222728 is a deficient number, since it is larger than the sum of its proper divisors (7194902).

8222728 is a wasteful number, since it uses less digits than its factorization.

8222728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027847 (or 1027843 counting only the distinct ones).

The product of its digits is 7168, while the sum is 31.

The square root of 8222728 is about 2867.5299475332. The cubic root of 8222728 is about 201.8391033248.

The spelling of 8222728 in words is "eight million, two hundred twenty-two thousand, seven hundred twenty-eight".