4004394 has 16 divisors (see below), whose sum is σ = 8267520. Its totient is φ = 1291680.

The previous prime is 4004393. The next prime is 4004417. The reversal of 4004394 is 4934004.

4004394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4004393) 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 7 ways as a sum of consecutive naturals, for example, 10579 + ... + 10950.

It is an arithmetic number, because the mean of its divisors is an integer number (516720).

Almost surely, 2^4004394 is an apocalyptic number.

4004394 is an abundant number, since it is smaller than the sum of its proper divisors (4263126).

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

4004394 is a wasteful number, since it uses less digits than its factorization.

4004394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21565.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 4004394 is about 2001.0981984900. The cubic root of 4004394 is about 158.7982092614.

Adding to 4004394 its reverse (4934004), we get a palindrome (8938398).

The spelling of 4004394 in words is "four million, four thousand, three hundred ninety-four".