422544656 has 40 divisors (see below), whose sum is σ = 868705560. Its totient is φ = 198416384.

The previous prime is 422544653. The next prime is 422544719. The reversal of 422544656 is 656445224.

It can be written as a sum of positive squares in 4 ways, for example, as 53290000 + 369254656 = 7300^2 + 19216^2 .

It is not an unprimeable number, because it can be changed into a prime (422544653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150110 + ... + 152898.

It is an arithmetic number, because the mean of its divisors is an integer number (21717639).

Almost surely, 2^422544656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422544656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434352780).

422544656 is an abundant number, since it is smaller than the sum of its proper divisors (446160904).

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

422544656 is a wasteful number, since it uses less digits than its factorization.

422544656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371 (or 3365 counting only the distinct ones).

The product of its digits is 230400, while the sum is 38.

The square root of 422544656 is about 20555.8910290943. The cubic root of 422544656 is about 750.3966234014.

The spelling of 422544656 in words is "four hundred twenty-two million, five hundred forty-four thousand, six hundred fifty-six".