639020652 has 48 divisors (see below), whose sum is σ = 1523907840. Its totient is φ = 208363968.

The previous prime is 639020647. The next prime is 639020659. The reversal of 639020652 is 256020936.

639020652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (639020659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99474 + ... + 105702.

It is an arithmetic number, because the mean of its divisors is an integer number (31748080).

Almost surely, 2^639020652 is an apocalyptic number.

It is an amenable number.

639020652 is an abundant number, since it is smaller than the sum of its proper divisors (884887188).

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

639020652 is a wasteful number, since it uses less digits than its factorization.

639020652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6422 (or 6420 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 639020652 is about 25278.8578064754. The cubic root of 639020652 is about 861.3340805016.

The spelling of 639020652 in words is "six hundred thirty-nine million, twenty thousand, six hundred fifty-two".