6438872344 has 8 divisors (see below), whose sum is σ = 12072885660. Its totient is φ = 3219436168.

The previous prime is 6438872249. The next prime is 6438872351. The reversal of 6438872344 is 4432788346.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402429514 + ... + 402429529.

Almost surely, 2^6438872344 is an apocalyptic number.

It is an amenable number.

6438872344 is a deficient number, since it is larger than the sum of its proper divisors (5634013316).

6438872344 is a wasteful number, since it uses less digits than its factorization.

6438872344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804859049 (or 804859045 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 49.

The square root of 6438872344 is about 80242.5843551914. The cubic root of 6438872344 is about 1860.3868952753.

The spelling of 6438872344 in words is "six billion, four hundred thirty-eight million, eight hundred seventy-two thousand, three hundred forty-four".