638552 has 16 divisors (see below), whose sum is σ = 1260600. Its totient is φ = 302400.

The previous prime is 638527. The next prime is 638567. The reversal of 638552 is 255836.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

638552 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, 1949 + ... + 2252.

2⁶³⁸⁵⁵² is an apocalyptic number.

It is an amenable number.

638552 is a deficient number, since it is larger than the sum of its proper divisors (622048).

638552 is a wasteful number, since it uses less digits than its factorization.

638552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4226 (or 4222 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 638552 is about 799.0944875295. The cubic root of 638552 is about 86.1123464115.

The spelling of 638552 in words is "six hundred thirty-eight thousand, five hundred fifty-two".