3688387 has 4 divisors (see below), whose sum is σ = 3692536. Its totient is φ = 3684240.

The previous prime is 3688369. The next prime is 3688393. The reversal of 3688387 is 7838863.

3688387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7838863 = 151 ⋅51913.

It is a cyclic number.

It is not a de Polignac number, because 3688387 - 2¹¹ = 3686339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3688357) by changing a digit.

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, 138 + ... + 2719.

It is an arithmetic number, because the mean of its divisors is an integer number (923134).

Almost surely, 2^3688387 is an apocalyptic number.

3688387 is a deficient number, since it is larger than the sum of its proper divisors (4149).

3688387 is a wasteful number, since it uses less digits than its factorization.

3688387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148.

The product of its digits is 193536, while the sum is 43.

The square root of 3688387 is about 1920.5173782083. The cubic root of 3688387 is about 154.5060515778.

The spelling of 3688387 in words is "three million, six hundred eighty-eight thousand, three hundred eighty-seven".