6448389 has 16 divisors (see below), whose sum is σ = 9160128. Its totient is φ = 4020992.

The previous prime is 6448381. The next prime is 6448399. The reversal of 6448389 is 9838446.

It is a cyclic number.

It is not a de Polignac number, because 6448389 - 2³ = 6448381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6448389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6448381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11299 + ... + 11855.

It is an arithmetic number, because the mean of its divisors is an integer number (572508).

Almost surely, 2^6448389 is an apocalyptic number.

It is an amenable number.

6448389 is a deficient number, since it is larger than the sum of its proper divisors (2711739).

6448389 is a wasteful number, since it uses less digits than its factorization.

6448389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its digits is 165888, while the sum is 42.

The square root of 6448389 is about 2539.3678347179. The cubic root of 6448389 is about 186.1302994960.

The spelling of 6448389 in words is "six million, four hundred forty-eight thousand, three hundred eighty-nine".