4004445 has 16 divisors (see below), whose sum is σ = 6439680. Its totient is φ = 2124864.

The previous prime is 4004417. The next prime is 4004449. The reversal of 4004445 is 5444004.

It is not a de Polignac number, because 4004445 - 2¹⁵ = 3971677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3027 + ... + 4143.

It is an arithmetic number, because the mean of its divisors is an integer number (402480).

Almost surely, 2^4004445 is an apocalyptic number.

It is an amenable number.

4004445 is a deficient number, since it is larger than the sum of its proper divisors (2435235).

4004445 is a wasteful number, since it uses less digits than its factorization.

4004445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 4004445 is about 2001.1109414523. The cubic root of 4004445 is about 158.7988834104.

Adding to 4004445 its reverse (5444004), we get a palindrome (9448449).

The spelling of 4004445 in words is "four million, four thousand, four hundred forty-five".