638852 has 12 divisors (see below), whose sum is σ = 1137360. Its totient is φ = 313896.

The previous prime is 638839. The next prime is 638857. The reversal of 638852 is 258836.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (638857) by changing a digit.

638852 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (94780).

2⁶³⁸⁸⁵² is an apocalyptic number.

It is an amenable number.

638852 is a deficient number, since it is larger than the sum of its proper divisors (498508).

638852 is a wasteful number, since it uses less digits than its factorization.

638852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770 (or 2768 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 638852 is about 799.2821779572. The cubic root of 638852 is about 86.1258298654.

The spelling of 638852 in words is "six hundred thirty-eight thousand, eight hundred fifty-two".