422838 has 36 divisors (see below), whose sum is σ = 999180. Its totient is φ = 129168.

The previous prime is 422827. The next prime is 422857. The reversal of 422838 is 838224.

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

422838 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 17 ways as a sum of consecutive naturals, for example, 2973 + ... + 3111.

It is an arithmetic number, because the mean of its divisors is an integer number (27755).

2⁴²²⁸³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (499590).

422838 is an abundant number, since it is smaller than the sum of its proper divisors (576342).

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

422838 is a wasteful number, since it uses less digits than its factorization.

422838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 157 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 422838 is about 650.2599480208. The cubic root of 422838 is about 75.0570233003.

The spelling of 422838 in words is "four hundred twenty-two thousand, eight hundred thirty-eight".