195638 has 8 divisors (see below), whose sum is σ = 306288. Its totient is φ = 93544.

The previous prime is 195599. The next prime is 195659. The reversal of 195638 is 836591.

195638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 2081 + ... + 2172.

It is an arithmetic number, because the mean of its divisors is an integer number (38286).

2¹⁹⁵⁶³⁸ is an apocalyptic number.

195638 is a deficient number, since it is larger than the sum of its proper divisors (110650).

195638 is a wasteful number, since it uses less digits than its factorization.

195638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4278.

The product of its digits is 6480, while the sum is 32.

The square root of 195638 is about 442.3098461486. The cubic root of 195638 is about 58.0520737245.

The spelling of 195638 in words is "one hundred ninety-five thousand, six hundred thirty-eight".