6400448 has 28 divisors (see below), whose sum is σ = 12844272. Its totient is φ = 3164160.

The previous prime is 6400423. The next prime is 6400451. The reversal of 6400448 is 8440046.

6400448 is nontrivially palindromic in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5693 + ... + 6723.

It is an arithmetic number, because the mean of its divisors is an integer number (458724).

Almost surely, 2^6400448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6400448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6422136).

6400448 is an abundant number, since it is smaller than the sum of its proper divisors (6443824).

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

6400448 is a wasteful number, since it uses less digits than its factorization.

6400448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 6400448 is about 2529.9106703597. The cubic root of 6400448 is about 185.6678853930.

The spelling of 6400448 in words is "six million, four hundred thousand, four hundred forty-eight".