422428 has 6 divisors (see below), whose sum is σ = 739256. Its totient is φ = 211212.

The previous prime is 422407. The next prime is 422431. The reversal of 422428 is 824224.

It is a junction number, because it is equal to n+sod(n) for n = 422399 and 422408.

It is a congruent number.

It is an unprimeable number.

422428 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 as a sum of consecutive naturals, namely, 52800 + ... + 52807.

2⁴²²⁴²⁸ is an apocalyptic number.

It is an amenable number.

422428 is a deficient number, since it is larger than the sum of its proper divisors (316828).

422428 is a wasteful number, since it uses less digits than its factorization.

422428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105611 (or 105609 counting only the distinct ones).

The product of its digits is 1024, while the sum is 22.

The square root of 422428 is about 649.9446130248. The cubic root of 422428 is about 75.0327560622.

The spelling of 422428 in words is "four hundred twenty-two thousand, four hundred twenty-eight".