644446314 has 16 divisors (see below), whose sum is σ = 1432103040. Its totient is φ = 214815420.

The previous prime is 644446303. The next prime is 644446333. The reversal of 644446314 is 413644446.

644446314 is a `hidden beast` number, since 644 + 4 + 4 + 6 + 3 + 1 + 4 = 666.

644446314 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×644446314² = 830622103256373192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5967042 + ... + 5967149.

It is an arithmetic number, because the mean of its divisors is an integer number (89506440).

Almost surely, 2^644446314 is an apocalyptic number.

644446314 is an abundant number, since it is smaller than the sum of its proper divisors (787656726).

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

644446314 is a wasteful number, since it uses less digits than its factorization.

644446314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11934202 (or 11934196 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 644446314 is about 25385.9471755536. The cubic root of 644446314 is about 863.7649582489.

The spelling of 644446314 in words is "six hundred forty-four million, four hundred forty-six thousand, three hundred fourteen".