639569352 has 64 divisors (see below), whose sum is σ = 1629089280. Its totient is φ = 209198592.

The previous prime is 639569341. The next prime is 639569353. The reversal of 639569352 is 253965936.

It is not an unprimeable number, because it can be changed into a prime (639569353) 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, 389878 + ... + 391514.

It is an arithmetic number, because the mean of its divisors is an integer number (25454520).

Almost surely, 2^639569352 is an apocalyptic number.

It is an amenable number.

639569352 is an abundant number, since it is smaller than the sum of its proper divisors (989519928).

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

639569352 is a wasteful number, since it uses less digits than its factorization.

639569352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942 (or 1938 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 48.

The square root of 639569352 is about 25289.7084206204. The cubic root of 639569352 is about 861.5805403522.

The spelling of 639569352 in words is "six hundred thirty-nine million, five hundred sixty-nine thousand, three hundred fifty-two".