422320644 has 18 divisors (see below), whose sum is σ = 1067532830. Its totient is φ = 140773536.

The previous prime is 422320621. The next prime is 422320651. The reversal of 422320644 is 446023224.

It can be written as a sum of positive squares in only one way, i.e., 380718144 + 41602500 = 19512^2 + 6450^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5865529 + ... + 5865600.

Almost surely, 2^422320644 is an apocalyptic number.

It is an amenable number.

422320644 is an abundant number, since it is smaller than the sum of its proper divisors (645212186).

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

422320644 is a wasteful number, since it uses less digits than its factorization.

422320644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11731139 (or 11731134 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 422320644 is about 20550.4414551123. The cubic root of 422320644 is about 750.2639923998.

Adding to 422320644 its reverse (446023224), we get a palindrome (868343868).

The spelling of 422320644 in words is "four hundred twenty-two million, three hundred twenty thousand, six hundred forty-four".