2644875438 has 8 divisors (see below), whose sum is σ = 5289750888. Its totient is φ = 881625144.

The previous prime is 2644875413. The next prime is 2644875439. The reversal of 2644875438 is 8345784462.

It is a sphenic number, since it is the product of 3 distinct primes.

2644875438 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644875439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220406281 + ... + 220406292.

It is an arithmetic number, because the mean of its divisors is an integer number (661218861).

Almost surely, 2^2644875438 is an apocalyptic number.

2644875438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2644875438 is a wasteful number, since it uses less digits than its factorization.

2644875438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440812578.

The product of its digits is 5160960, while the sum is 51.

The square root of 2644875438 is about 51428.3524721529. The cubic root of 2644875438 is about 1382.9349142184.

The spelling of 2644875438 in words is "two billion, six hundred forty-four million, eight hundred seventy-five thousand, four hundred thirty-eight".