4223638 has 4 divisors (see below), whose sum is σ = 6335460. Its totient is φ = 2111818.

The previous prime is 4223629. The next prime is 4223663. The reversal of 4223638 is 8363224.

It is a semiprime because it is the product of two primes.

It is a d-powerful number, because it can be written as 4¹¹ + 2⁷ + 2¹³ + 3³ + 6⁴ + 3⁹ + 8 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055908 + ... + 1055911.

It is an arithmetic number, because the mean of its divisors is an integer number (1583865).

Almost surely, 2^4223638 is an apocalyptic number.

4223638 is a deficient number, since it is larger than the sum of its proper divisors (2111822).

4223638 is a wasteful number, since it uses less digits than its factorization.

4223638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111821.

The product of its digits is 6912, while the sum is 28.

The square root of 4223638 is about 2055.1491430064. The cubic root of 4223638 is about 161.6449828619.

The spelling of 4223638 in words is "four million, two hundred twenty-three thousand, six hundred thirty-eight".