422431644 has 48 divisors (see below), whose sum is σ = 1003806720. Its totient is φ = 138240960.

The previous prime is 422431643. The next prime is 422431679. The reversal of 422431644 is 446134224.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422431643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179902 + ... + 182234.

It is an arithmetic number, because the mean of its divisors is an integer number (20912640).

Almost surely, 2^422431644 is an apocalyptic number.

It is an amenable number.

422431644 is an abundant number, since it is smaller than the sum of its proper divisors (581375076).

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

422431644 is a wasteful number, since it uses less digits than its factorization.

422431644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610 (or 2608 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

The square root of 422431644 is about 20553.1419495901. The cubic root of 422431644 is about 750.3297181378.

Adding to 422431644 its reverse (446134224), we get a palindrome (868565868).

The spelling of 422431644 in words is "four hundred twenty-two million, four hundred thirty-one thousand, six hundred forty-four".