6448442320 has 40 divisors (see below), whose sum is σ = 15509621160. Its totient is φ = 2490432000.

The previous prime is 6448442267. The next prime is 6448442359. The reversal of 6448442320 is 232448446.

It can be written as a sum of positive squares in 4 ways, for example, as 1647061056 + 4801381264 = 40584^2 + 69292^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 6448442320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1387431 + ... + 1392070.

It is an arithmetic number, because the mean of its divisors is an integer number (387740529).

Almost surely, 2^6448442320 is an apocalyptic number.

It is an amenable number.

6448442320 is an abundant number, since it is smaller than the sum of its proper divisors (9061178840).

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

6448442320 is a wasteful number, since it uses less digits than its factorization.

6448442320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779543 (or 2779537 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 37.

The square root of 6448442320 is about 80302.1937433841. The cubic root of 6448442320 is about 1861.3081251506.

The spelling of 6448442320 in words is "six billion, four hundred forty-eight million, four hundred forty-two thousand, three hundred twenty".