422721764 has 24 divisors (see below), whose sum is σ = 748760376. Its totient is φ = 208800000.

The previous prime is 422721749. The next prime is 422721821. The reversal of 422721764 is 467127224.

It can be written as a sum of positive squares in 4 ways, for example, as 96196864 + 326524900 = 9808^2 + 18070^2 .

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 7 ways as a sum of consecutive naturals, for example, 241934 + ... + 243674.

It is an arithmetic number, because the mean of its divisors is an integer number (31198349).

Almost surely, 2^422721764 is an apocalyptic number.

It is an amenable number.

422721764 is a deficient number, since it is larger than the sum of its proper divisors (326038612).

422721764 is a wasteful number, since it uses less digits than its factorization.

422721764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447 (or 2445 counting only the distinct ones).

The product of its digits is 37632, while the sum is 35.

The square root of 422721764 is about 20560.1985398974. The cubic root of 422721764 is about 750.5014507289.

Adding to 422721764 its reverse (467127224), we get a palindrome (889848988).

The spelling of 422721764 in words is "four hundred twenty-two million, seven hundred twenty-one thousand, seven hundred sixty-four".