6440080288 has 24 divisors (see below), whose sum is σ = 13021583652. Its totient is φ = 3133011456.

The previous prime is 6440080243. The next prime is 6440080291. The reversal of 6440080288 is 8820800446.

It can be written as a sum of positive squares in 2 ways, for example, as 5462392464 + 977687824 = 73908^2 + 31268^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6440080288.

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, 2718445 + ... + 2720812.

Almost surely, 2^6440080288 is an apocalyptic number.

It is an amenable number.

6440080288 is an abundant number, since it is smaller than the sum of its proper divisors (6581503364).

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

6440080288 is a wasteful number, since it uses less digits than its factorization.

6440080288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439304 (or 5439296 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 6440080288 is about 80250.1108285839. The cubic root of 6440080288 is about 1860.5032253071.

The spelling of 6440080288 in words is "six billion, four hundred forty million, eighty thousand, two hundred eighty-eight".