422440 has 32 divisors (see below), whose sum is σ = 972000. Its totient is φ = 165184.

The previous prime is 422431. The next prime is 422453. The reversal of 422440 is 44224.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2271 + ... + 2449.

It is an arithmetic number, because the mean of its divisors is an integer number (30375).

2⁴²²⁴⁴⁰ is an apocalyptic number.

422440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (486000).

422440 is an abundant number, since it is smaller than the sum of its proper divisors (549560).

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

422440 is a wasteful number, since it uses less digits than its factorization.

422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 422440 is about 649.9538445151. The cubic root of 422440 is about 75.0334665458.

Adding to 422440 its reverse (44224), we get a palindrome (466664).

The spelling of 422440 in words is "four hundred twenty-two thousand, four hundred forty", and thus it is an iban number.