422643564 has 144 divisors (see below), whose sum is σ = 1274757120. Its totient is φ = 115516800.

The previous prime is 422643547. The next prime is 422643577. The reversal of 422643564 is 465346224.

422643564 is a `hidden beast` number, since 4 + 2 + 2 + 643 + 5 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1103317 + ... + 1103699.

It is an arithmetic number, because the mean of its divisors is an integer number (8852480).

Almost surely, 2^422643564 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 422643564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (637378560).

422643564 is an abundant number, since it is smaller than the sum of its proper divisors (852113556).

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

422643564 is a wasteful number, since it uses less digits than its factorization.

422643564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 575 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 422643564 is about 20558.2967193296. The cubic root of 422643564 is about 750.4551690390.

Adding to 422643564 its reverse (465346224), we get a palindrome (887989788).

The spelling of 422643564 in words is "four hundred twenty-two million, six hundred forty-three thousand, five hundred sixty-four".