422418 has 16 divisors (see below), whose sum is σ = 881856. Its totient is φ = 134640.

The previous prime is 422407. The next prime is 422431. The reversal of 422418 is 814224.

It is a junction number, because it is equal to n+sod(n) for n = 422394 and 422403.

It is a congruent number.

It is an unprimeable number.

422418 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, 1393 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (55116).

2⁴²²⁴¹⁸ is an apocalyptic number.

422418 is an abundant number, since it is smaller than the sum of its proper divisors (459438).

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

422418 is a wasteful number, since it uses less digits than its factorization.

422418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089.

The product of its digits is 512, while the sum is 21.

The square root of 422418 is about 649.9369200161. The cubic root of 422418 is about 75.0321639822.

It can be divided in two parts, 4 and 22418, that added together give a palindrome (22422).

The spelling of 422418 in words is "four hundred twenty-two thousand, four hundred eighteen".