4223818 has 4 divisors (see below), whose sum is σ = 6335730. Its totient is φ = 2111908.

The previous prime is 4223801. The next prime is 4223831. The reversal of 4223818 is 8183224.

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

It can be written as a sum of positive squares in only one way, i.e., 2393209 + 1830609 = 1547^2 + 1353^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055953 + ... + 1055956.

Almost surely, 2^4223818 is an apocalyptic number.

4223818 is a deficient number, since it is larger than the sum of its proper divisors (2111912).

4223818 is a wasteful number, since it uses less digits than its factorization.

4223818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111911.

The product of its digits is 3072, while the sum is 28.

The square root of 4223818 is about 2055.1929349820. The cubic root of 4223818 is about 161.6472791196.

It can be divided in two parts, 4223 and 818, that added together give a square (5041 = 71²).

The spelling of 4223818 in words is "four million, two hundred twenty-three thousand, eight hundred eighteen".