639460322 has 6 divisors (see below), whose sum is σ = 959244129. Its totient is φ = 319712280.

The previous prime is 639460319. The next prime is 639460331. The reversal of 639460322 is 223064936.

639460322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 628956241 + 10504081 = 25079^2 + 3241^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=17881.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 26822 + ... + 44702.

Almost surely, 2^639460322 is an apocalyptic number.

639460322 is a deficient number, since it is larger than the sum of its proper divisors (319783807).

639460322 is an frugal number, since it uses more digits than its factorization.

639460322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35764 (or 17883 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 639460322 is about 25287.5527087933. The cubic root of 639460322 is about 861.5315785185.

The spelling of 639460322 in words is "six hundred thirty-nine million, four hundred sixty thousand, three hundred twenty-two".