408222 has 12 divisors (see below), whose sum is σ = 884520. Its totient is φ = 136068.

The previous prime is 408217. The next prime is 408223. The reversal of 408222 is 222804.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 22679 = 408222 / (4 + 0 + 8 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 408195 and 408204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11322 + ... + 11357.

It is an arithmetic number, because the mean of its divisors is an integer number (73710).

2⁴⁰⁸²²² is an apocalyptic number.

408222 is an abundant number, since it is smaller than the sum of its proper divisors (476298).

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

408222 is a wasteful number, since it uses less digits than its factorization.

408222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22687 (or 22684 counting only the distinct ones).

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

The square root of 408222 is about 638.9225305152. The cubic root of 408222 is about 74.1820450934.

It can be divided in two parts, 408 and 222, that added together give a triangular number (630 = T₃₅).

The spelling of 408222 in words is "four hundred eight thousand, two hundred twenty-two".