4448639 has 4 divisors (see below), whose sum is σ = 4790856. Its totient is φ = 4106424.

The previous prime is 4448579. The next prime is 4448657. The reversal of 4448639 is 9368444.

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

It is a cyclic number.

It is not a de Polignac number, because 4448639 - 2⁸ = 4448383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4448699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171089 + ... + 171114.

It is an arithmetic number, because the mean of its divisors is an integer number (1197714).

Almost surely, 2^4448639 is an apocalyptic number.

4448639 is a deficient number, since it is larger than the sum of its proper divisors (342217).

4448639 is a wasteful number, since it uses less digits than its factorization.

4448639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342216.

The product of its digits is 82944, while the sum is 38.

The square root of 4448639 is about 2109.1796983662. The cubic root of 4448639 is about 164.4658453433.

The spelling of 4448639 in words is "four million, four hundred forty-eight thousand, six hundred thirty-nine".