422644 has 12 divisors (see below), whose sum is σ = 745444. Its totient is φ = 209664.

The previous prime is 422627. The next prime is 422657. The reversal of 422644 is 446224.

It can be written as a sum of positive squares in 2 ways, for example, as 131044 + 291600 = 362^2 + 540^2 .

It is a congruent number.

It is an unprimeable number.

422644 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292 + ... + 964.

2⁴²²⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

422644 is a deficient number, since it is larger than the sum of its proper divisors (322800).

422644 is a wasteful number, since it uses less digits than its factorization.

422644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 832 counting only the distinct ones).

The product of its digits is 1536, while the sum is 22.

The square root of 422644 is about 650.1107597941. The cubic root of 422644 is about 75.0455427096.

Adding to 422644 its reverse (446224), we get a palindrome (868868).

The spelling of 422644 in words is "four hundred twenty-two thousand, six hundred forty-four".