6448394420 has 72 divisors (see below), whose sum is σ = 15435332640. Its totient is φ = 2255610240.

The previous prime is 6448394411. The next prime is 6448394443. The reversal of 6448394420 is 244938446.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14015 + ... + 114425.

It is an arithmetic number, because the mean of its divisors is an integer number (214379620).

Almost surely, 2^6448394420 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 6448394420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7717666320).

6448394420 is an abundant number, since it is smaller than the sum of its proper divisors (8986938220).

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

6448394420 is a wasteful number, since it uses less digits than its factorization.

6448394420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100465 (or 100450 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 44.

The square root of 6448394420 is about 80301.8954944402. The cubic root of 6448394420 is about 1861.3035164469.

The spelling of 6448394420 in words is "six billion, four hundred forty-eight million, three hundred ninety-four thousand, four hundred twenty".