4420638 has 12 divisors (see below), whose sum is σ = 9578088. Its totient is φ = 1473540.

The previous prime is 4420627. The next prime is 4420639. The reversal of 4420638 is 8360244.

4420638 is a `hidden beast` number, since 4 + 4 + 20 + 638 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4420639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122778 + ... + 122813.

It is an arithmetic number, because the mean of its divisors is an integer number (798174).

Almost surely, 2^4420638 is an apocalyptic number.

4420638 is an abundant number, since it is smaller than the sum of its proper divisors (5157450).

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

4420638 is a wasteful number, since it uses less digits than its factorization.

4420638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245599 (or 245596 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 4420638 is about 2102.5313315145. The cubic root of 4420638 is about 164.1200538755.

It can be divided in two parts, 44206 and 38, that added together give a palindrome (44244).

The spelling of 4420638 in words is "four million, four hundred twenty thousand, six hundred thirty-eight".