428022 has 48 divisors (see below), whose sum is σ = 1098240. Its totient is φ = 117936.

The previous prime is 428003. The next prime is 428023. The reversal of 428022 is 220824.

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

It is a junction number, because it is equal to n+sod(n) for n = 427986 and 428004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428023) by changing a digit.

428022 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 23 ways as a sum of consecutive naturals, for example, 5379 + ... + 5457.

It is an arithmetic number, because the mean of its divisors is an integer number (22880).

2⁴²⁸⁰²² is an apocalyptic number.

428022 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 428022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549120).

428022 is an abundant number, since it is smaller than the sum of its proper divisors (670218).

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

428022 is a wasteful number, since it uses less digits than its factorization.

428022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 134 counting only the distinct ones).

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

The square root of 428022 is about 654.2339031264. The cubic root of 428022 is about 75.3625116477.

Adding to 428022 its reverse (220824), we get a palindrome (648846).

The spelling of 428022 in words is "four hundred twenty-eight thousand, twenty-two".