639482342 has 12 divisors (see below), whose sum is σ = 964553148. Its totient is φ = 317967300.

The previous prime is 639482341. The next prime is 639482377. The reversal of 639482342 is 243284936.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 639482342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639482341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 518867 + ... + 520097.

It is an arithmetic number, because the mean of its divisors is an integer number (80379429).

Almost surely, 2^639482342 is an apocalyptic number.

639482342 is a deficient number, since it is larger than the sum of its proper divisors (325070806).

639482342 is an equidigital number, since it uses as much as digits as its factorization.

639482342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675 (or 1444 counting only the distinct ones).

The product of its digits is 248832, while the sum is 41.

The square root of 639482342 is about 25287.9880971184. The cubic root of 639482342 is about 861.5414674342.

The spelling of 639482342 in words is "six hundred thirty-nine million, four hundred eighty-two thousand, three hundred forty-two".