3688438 has 8 divisors (see below), whose sum is σ = 5958288. Its totient is φ = 1702344.

The previous prime is 3688393. The next prime is 3688453. The reversal of 3688438 is 8348863.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3688438.

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 3 ways as a sum of consecutive naturals, for example, 70906 + ... + 70957.

It is an arithmetic number, because the mean of its divisors is an integer number (744786).

Almost surely, 2^3688438 is an apocalyptic number.

3688438 is a deficient number, since it is larger than the sum of its proper divisors (2269850).

3688438 is a wasteful number, since it uses less digits than its factorization.

3688438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141878.

The product of its digits is 110592, while the sum is 40.

The square root of 3688438 is about 1920.5306558345. The cubic root of 3688438 is about 154.5067637023.

The spelling of 3688438 in words is "three million, six hundred eighty-eight thousand, four hundred thirty-eight".