422128 has 20 divisors (see below), whose sum is σ = 934960. Its totient is φ = 180864.

The previous prime is 422113. The next prime is 422129. The reversal of 422128 is 821224.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1773 + ... + 1996.

It is an arithmetic number, because the mean of its divisors is an integer number (46748).

2⁴²²¹²⁸ is an apocalyptic number.

It is an amenable number.

422128 is an abundant number, since it is smaller than the sum of its proper divisors (512832).

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

422128 is a wasteful number, since it uses less digits than its factorization.

422128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784 (or 3778 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

The square root of 422128 is about 649.7137831384. The cubic root of 422128 is about 75.0149895966.

The spelling of 422128 in words is "four hundred twenty-two thousand, one hundred twenty-eight".