422648738 has 6 divisors (see below), whose sum is σ = 634016721. Its totient is φ = 211309832.

The previous prime is 422648717. The next prime is 422648753. The reversal of 422648738 is 837846224.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 391367089 + 31281649 = 19783^2 + 5593^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14537.

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 21806 + ... + 36342.

Almost surely, 2^422648738 is an apocalyptic number.

422648738 is a deficient number, since it is larger than the sum of its proper divisors (211367983).

422648738 is an frugal number, since it uses more digits than its factorization.

422648738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29076 (or 14539 counting only the distinct ones).

The product of its digits is 516096, while the sum is 44.

The square root of 422648738 is about 20558.4225562177. The cubic root of 422648738 is about 750.4582313824.

The spelling of 422648738 in words is "four hundred twenty-two million, six hundred forty-eight thousand, seven hundred thirty-eight".