639832552 has 32 divisors (see below), whose sum is σ = 1230707520. Its totient is φ = 311666560.

The previous prime is 639832549. The next prime is 639832559. The reversal of 639832552 is 255238936.

It is a junction number, because it is equal to n+sod(n) for n = 639832499 and 639832508.

It is not an unprimeable number, because it can be changed into a prime (639832559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447663 + ... + 449089.

It is an arithmetic number, because the mean of its divisors is an integer number (38459610).

Almost surely, 2^639832552 is an apocalyptic number.

It is an amenable number.

639832552 is a deficient number, since it is larger than the sum of its proper divisors (590874968).

639832552 is a wasteful number, since it uses less digits than its factorization.

639832552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841 (or 2837 counting only the distinct ones).

The product of its digits is 388800, while the sum is 43.

The square root of 639832552 is about 25294.9115831623. The cubic root of 639832552 is about 861.6987120030.

The spelling of 639832552 in words is "six hundred thirty-nine million, eight hundred thirty-two thousand, five hundred fifty-two".