638588 has 12 divisors (see below), whose sum is σ = 1183392. Its totient is φ = 300480.

The previous prime is 638587. The next prime is 638621. The reversal of 638588 is 885836.

It is a happy number.

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 638588.

It is not an unprimeable number, because it can be changed into a prime (638581) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4628 + ... + 4763.

It is an arithmetic number, because the mean of its divisors is an integer number (98616).

2⁶³⁸⁵⁸⁸ is an apocalyptic number.

638588 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

638588 is a deficient number, since it is larger than the sum of its proper divisors (544804).

638588 is a wasteful number, since it uses less digits than its factorization.

638588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412 (or 9410 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 638588 is about 799.1170127084. The cubic root of 638588 is about 86.1139646490.

The spelling of 638588 in words is "six hundred thirty-eight thousand, five hundred eighty-eight".