638038 has 8 divisors (see below), whose sum is σ = 961488. Its totient is φ = 317544.

The previous prime is 638023. The next prime is 638047. The reversal of 638038 is 830836.

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

It is a super-3 number, since 3×638038³ = 779221433339612616, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 637997 and 638015.

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, 81 + ... + 1132.

It is an arithmetic number, because the mean of its divisors is an integer number (120186).

2⁶³⁸⁰³⁸ is an apocalyptic number.

638038 is a deficient number, since it is larger than the sum of its proper divisors (323450).

638038 is a wasteful number, since it uses less digits than its factorization.

638038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 638038 is about 798.7728087510. The cubic root of 638038 is about 86.0892349409.

The spelling of 638038 in words is "six hundred thirty-eight thousand, thirty-eight".