638108 has 12 divisors (see below), whose sum is σ = 1133832. Its totient is φ = 314160.

The previous prime is 638081. The next prime is 638117. The reversal of 638108 is 801836.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 638108.

It is an unprimeable 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, 923 + ... + 1458.

It is an arithmetic number, because the mean of its divisors is an integer number (94486).

2⁶³⁸¹⁰⁸ is an apocalyptic number.

It is an amenable number.

638108 is a deficient number, since it is larger than the sum of its proper divisors (495724).

638108 is a wasteful number, since it uses less digits than its factorization.

638108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452 (or 2450 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 638108 is about 798.8166247644. The cubic root of 638108 is about 86.0923831473.

The spelling of 638108 in words is "six hundred thirty-eight thousand, one hundred eight".