6439910398 has 8 divisors (see below), whose sum is σ = 9694739592. Its totient is φ = 3208330536.

The previous prime is 6439910381. The next prime is 6439910419. The reversal of 6439910398 is 8930199346.

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

It is a congruent number.

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, 5811640 + ... + 5812747.

It is an arithmetic number, because the mean of its divisors is an integer number (1211842449).

Almost surely, 2^6439910398 is an apocalyptic number.

6439910398 is a deficient number, since it is larger than the sum of its proper divisors (3254829194).

6439910398 is a wasteful number, since it uses less digits than its factorization.

6439910398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11624666.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 6439910398 is about 80249.0523183919. The cubic root of 6439910398 is about 1860.4868650725.

The spelling of 6439910398 in words is "six billion, four hundred thirty-nine million, nine hundred ten thousand, three hundred ninety-eight".