3688215 has 8 divisors (see below), whose sum is σ = 5901168. Its totient is φ = 1967040.

The previous prime is 3688199. The next prime is 3688219. The reversal of 3688215 is 5128863.

It is a happy number.

3688215 is digitally balanced in base 2, 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 not a de Polignac number, because 3688215 - 2⁴ = 3688199 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3688219) 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 7 ways as a sum of consecutive naturals, for example, 122926 + ... + 122955.

It is an arithmetic number, because the mean of its divisors is an integer number (737646).

Almost surely, 2^3688215 is an apocalyptic number.

3688215 is a deficient number, since it is larger than the sum of its proper divisors (2212953).

3688215 is a wasteful number, since it uses less digits than its factorization.

3688215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245889.

The product of its digits is 11520, while the sum is 33.

The square root of 3688215 is about 1920.4725980862. The cubic root of 3688215 is about 154.5036498546.

The spelling of 3688215 in words is "three million, six hundred eighty-eight thousand, two hundred fifteen".