3813638 has 8 divisors (see below), whose sum is σ = 5728800. Its totient is φ = 1904040.

The previous prime is 3813631. The next prime is 3813643. The reversal of 3813638 is 8363183.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3813631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1688 + ... + 3236.

It is an arithmetic number, because the mean of its divisors is an integer number (716100).

Almost surely, 2^3813638 is an apocalyptic number.

3813638 is a deficient number, since it is larger than the sum of its proper divisors (1915162).

3813638 is a wasteful number, since it uses less digits than its factorization.

3813638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782.

The product of its digits is 10368, while the sum is 32.

The square root of 3813638 is about 1952.8538091726. The cubic root of 3813638 is about 156.2355361545.

The spelling of 3813638 in words is "three million, eight hundred thirteen thousand, six hundred thirty-eight".