644838314 has 8 divisors (see below), whose sum is σ = 967391040. Its totient is φ = 322374636.

The previous prime is 644838301. The next prime is 644838323. The reversal of 644838314 is 413838446.

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

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, 497 + ... + 35915.

It is an arithmetic number, because the mean of its divisors is an integer number (120923880).

Almost surely, 2^644838314 is an apocalyptic number.

644838314 is a deficient number, since it is larger than the sum of its proper divisors (322552726).

644838314 is a wasteful number, since it uses less digits than its factorization.

644838314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44524.

The product of its digits is 221184, while the sum is 41.

The square root of 644838314 is about 25393.6668088719. Note that the first 3 decimals coincide. The cubic root of 644838314 is about 863.9400580343.

The spelling of 644838314 in words is "six hundred forty-four million, eight hundred thirty-eight thousand, three hundred fourteen".