644306314 has 16 divisors (see below), whose sum is σ = 1025576640. Its totient is φ = 302922400.

The previous prime is 644306309. The next prime is 644306317. The reversal of 644306314 is 413603446.

It is a happy number.

644306314 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (644306317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115987 + ... + 121414.

It is an arithmetic number, because the mean of its divisors is an integer number (64098540).

Almost surely, 2^644306314 is an apocalyptic number.

644306314 is a deficient number, since it is larger than the sum of its proper divisors (381270326).

644306314 is a wasteful number, since it uses less digits than its factorization.

644306314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237485.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 644306314 is about 25383.1895946904. The cubic root of 644306314 is about 863.7024054035.

The spelling of 644306314 in words is "six hundred forty-four million, three hundred six thousand, three hundred fourteen".