638015 has 8 divisors (see below), whose sum is σ = 875040. Its totient is φ = 437472.

The previous prime is 637939. The next prime is 638023. The reversal of 638015 is 510836.

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

It is not a de Polignac number, because 638015 - 2¹⁴ = 621631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9080 + ... + 9149.

It is an arithmetic number, because the mean of its divisors is an integer number (109380).

2⁶³⁸⁰¹⁵ is an apocalyptic number.

638015 is a deficient number, since it is larger than the sum of its proper divisors (237025).

638015 is a wasteful number, since it uses less digits than its factorization.

638015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18241.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 638015 is about 798.7584115363. The cubic root of 638015 is about 86.0882004799.

The spelling of 638015 in words is "six hundred thirty-eight thousand, fifteen".