638102 has 8 divisors (see below), whose sum is σ = 983136. Its totient is φ = 310392.

The previous prime is 638081. The next prime is 638117. The reversal of 638102 is 201836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 4238 + ... + 4385.

It is an arithmetic number, because the mean of its divisors is an integer number (122892).

2⁶³⁸¹⁰² is an apocalyptic number.

638102 is a deficient number, since it is larger than the sum of its proper divisors (345034).

638102 is a wasteful number, since it uses less digits than its factorization.

638102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8662.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 638102 is about 798.8128692003. The cubic root of 638102 is about 86.0921133101.

Adding to 638102 its reverse (201836), we get a palindrome (839938).

The spelling of 638102 in words is "six hundred thirty-eight thousand, one hundred two".