822646228 has 12 divisors (see below), whose sum is σ = 1441813492. Its totient is φ = 410699520.

The previous prime is 822646213. The next prime is 822646243.

822646228 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (822646213) and next prime (822646243).

It can be written as a sum of positive squares in 2 ways, for example, as 498718224 + 323928004 = 22332^2 + 17998^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152925 + ... + 158212.

Almost surely, 2^822646228 is an apocalyptic number.

It is an amenable number.

822646228 is a deficient number, since it is larger than the sum of its proper divisors (619167264).

822646228 is a wasteful number, since it uses less digits than its factorization.

822646228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311802 (or 311800 counting only the distinct ones).

The product of its digits is 147456, while the sum is 40.

The square root of 822646228 is about 28681.8100544579. The cubic root of 822646228 is about 936.9959280845.

The spelling of 822646228 in words is "eight hundred twenty-two million, six hundred forty-six thousand, two hundred twenty-eight".