639441082 has 24 divisors (see below), whose sum is σ = 1118422080. Its totient is φ = 273392280.

The previous prime is 639441053. The next prime is 639441109. The reversal of 639441082 is 280144936.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34669 + ... + 49807.

It is an arithmetic number, because the mean of its divisors is an integer number (46600920).

Almost surely, 2^639441082 is an apocalyptic number.

639441082 is a deficient number, since it is larger than the sum of its proper divisors (478980998).

639441082 is a wasteful number, since it uses less digits than its factorization.

639441082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15586 (or 15579 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 639441082 is about 25287.1722816135. The cubic root of 639441082 is about 861.5229378813.

The spelling of 639441082 in words is "six hundred thirty-nine million, four hundred forty-one thousand, eighty-two".