4423906 has 4 divisors (see below), whose sum is σ = 6635862. Its totient is φ = 2211952.

The previous prime is 4423897. The next prime is 4423907. The reversal of 4423906 is 6093244.

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., 2295225 + 2128681 = 1515^2 + 1459^2 .

It is not an unprimeable number, because it can be changed into a prime (4423907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105975 + ... + 1105978.

Almost surely, 2^4423906 is an apocalyptic number.

4423906 is a deficient number, since it is larger than the sum of its proper divisors (2211956).

4423906 is a wasteful number, since it uses less digits than its factorization.

4423906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211955.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 4423906 is about 2103.3083463915. The cubic root of 4423906 is about 164.1604863670.

It can be divided in two parts, 4423 and 906, that added together give a square (5329 = 73²).

The spelling of 4423906 in words is "four million, four hundred twenty-three thousand, nine hundred six".