639540710 has 16 divisors (see below), whose sum is σ = 1152871056. Its totient is φ = 255439008.

The previous prime is 639540701. The next prime is 639540751. The reversal of 639540710 is 17045936.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 39989 + ... + 53648.

It is an arithmetic number, because the mean of its divisors is an integer number (72054441).

Almost surely, 2^639540710 is an apocalyptic number.

639540710 is a deficient number, since it is larger than the sum of its proper divisors (513330346).

639540710 is a wasteful number, since it uses less digits than its factorization.

639540710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94327.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 639540710 is about 25289.1421364980. The cubic root of 639540710 is about 861.5676786987.

The spelling of 639540710 in words is "six hundred thirty-nine million, five hundred forty thousand, seven hundred ten".