823340 has 24 divisors (see below), whose sum is σ = 1976352. Its totient is φ = 282240.

The previous prime is 823337. The next prime is 823349. The reversal of 823340 is 43328.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (823349) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2801 + ... + 3080.

It is an arithmetic number, because the mean of its divisors is an integer number (82348).

2⁸²³³⁴⁰ is an apocalyptic number.

It is an amenable number.

823340 is an abundant number, since it is smaller than the sum of its proper divisors (1153012).

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

823340 is a wasteful number, since it uses less digits than its factorization.

823340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897 (or 5895 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 823340 is about 907.3808461721. The cubic root of 823340 is about 93.7259256703.

Adding to 823340 its reverse (43328), we get a palindrome (866668).

The spelling of 823340 in words is "eight hundred twenty-three thousand, three hundred forty".