822340 has 12 divisors (see below), whose sum is σ = 1726956. Its totient is φ = 328928.

The previous prime is 822329. The next prime is 822343. The reversal of 822340 is 43228.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 432964 + 389376 = 658^2 + 624^2 .

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (822343) by changing a digit.

822340 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20539 + ... + 20578.

It is an arithmetic number, because the mean of its divisors is an integer number (143913).

2⁸²²³⁴⁰ is an apocalyptic number.

It is an amenable number.

822340 is an abundant number, since it is smaller than the sum of its proper divisors (904616).

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

822340 is a wasteful number, since it uses less digits than its factorization.

822340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41126 (or 41124 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 822340 is about 906.8296422151. The cubic root of 822340 is about 93.6879648859.

Adding to 822340 its reverse (43228), we get a palindrome (865568).

The spelling of 822340 in words is "eight hundred twenty-two thousand, three hundred forty".