822418 has 16 divisors (see below), whose sum is σ = 1289376. Its totient is φ = 393120.

The previous prime is 822407. The next prime is 822431. The reversal of 822418 is 814228.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 822392 and 822401.

It is a congruent number.

It is an unprimeable number.

822418 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6213 + ... + 6343.

It is an arithmetic number, because the mean of its divisors is an integer number (80586).

2⁸²²⁴¹⁸ is an apocalyptic number.

822418 is a deficient number, since it is larger than the sum of its proper divisors (466958).

822418 is a wasteful number, since it uses less digits than its factorization.

822418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249.

The product of its digits is 1024, while the sum is 25.

The square root of 822418 is about 906.8726481706. The cubic root of 822418 is about 93.6909269333.

It can be divided in two parts, 82 and 2418, that added together give a square (2500 = 50²).

The spelling of 822418 in words is "eight hundred twenty-two thousand, four hundred eighteen".