644302314 has 12 divisors (see below), whose sum is σ = 1395988386. Its totient is φ = 214767432.

The previous prime is 644302283. The next prime is 644302387. The reversal of 644302314 is 413203446.

644302314 is a `hidden beast` number, since 6 + 44 + 302 + 314 = 666.

It can be written as a sum of positive squares in only one way, i.e., 644296689 + 5625 = 25383^2 + 75^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17897269 + ... + 17897304.

Almost surely, 2^644302314 is an apocalyptic number.

644302314 is an abundant number, since it is smaller than the sum of its proper divisors (751686072).

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

644302314 is a wasteful number, since it uses less digits than its factorization.

644302314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35794581 (or 35794578 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 644302314 is about 25383.1108022638. The cubic root of 644302314 is about 863.7006180462.

The spelling of 644302314 in words is "six hundred forty-four million, three hundred two thousand, three hundred fourteen".