3638 has 8 divisors (see below), whose sum is σ = 5832.
Its totient is φ = 1696.
The previous prime is 3637. The next prime is 3643. The reversal of 3638 is 8363.
It is a sphenic number, since it is the product of 3 distinct primes.
It is an alternating number because its digits alternate between odd and even.
It is a plaindrome in base 14 and base 15.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3631) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 87.
It is an arithmetic number, because the mean of its divisors is an integer number (729).
3638 is a deficient number, since it is larger than the sum of its proper divisors (2194).
3638 is a wasteful number, since it uses less digits than its factorization.
3638 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 126.
The product of its digits is 432, while the sum is 20.
The square root of 3638 is about 60.3158354000.
The cubic root of 3638 is about 15.3799254935.
The spelling of 3638 in words is "three thousand, six hundred thirty-eight".