4404639 has 4 divisors (see below), whose sum is σ = 5872856. Its totient is φ = 2936424.

The previous prime is 4404623. The next prime is 4404641. The reversal of 4404639 is 9364044.

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

It is not a de Polignac number, because 4404639 - 2⁴ = 4404623 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4404679) 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 3 ways as a sum of consecutive naturals, for example, 734104 + ... + 734109.

It is an arithmetic number, because the mean of its divisors is an integer number (1468214).

Almost surely, 2^4404639 is an apocalyptic number.

4404639 is a deficient number, since it is larger than the sum of its proper divisors (1468217).

4404639 is a wasteful number, since it uses less digits than its factorization.

4404639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468216.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 4404639 is about 2098.7231832712. The cubic root of 4404639 is about 163.9218222473.

The spelling of 4404639 in words is "four million, four hundred four thousand, six hundred thirty-nine".