822402 has 48 divisors (see below), whose sum is σ = 2089152. Its totient is φ = 228960.

The previous prime is 822391. The next prime is 822407. The reversal of 822402 is 204228.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (822407) by changing a digit.

822402 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 23 ways as a sum of consecutive naturals, for example, 7633 + ... + 7739.

It is an arithmetic number, because the mean of its divisors is an integer number (43524).

2⁸²²⁴⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 822402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1044576).

822402 is an abundant number, since it is smaller than the sum of its proper divisors (1266750).

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

822402 is a wasteful number, since it uses less digits than its factorization.

822402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 822402 is about 906.8638266024. The cubic root of 822402 is about 93.6903193491.

The spelling of 822402 in words is "eight hundred twenty-two thousand, four hundred two".