3868215 has 32 divisors (see below), whose sum is σ = 6773760. Its totient is φ = 1873536.

The previous prime is 3868213. The next prime is 3868219. The reversal of 3868215 is 5128683.

It is a happy number.

It is not a de Polignac number, because 3868215 - 2¹ = 3868213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3868213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16066 + ... + 16304.

It is an arithmetic number, because the mean of its divisors is an integer number (211680).

Almost surely, 2^3868215 is an apocalyptic number.

3868215 is a deficient number, since it is larger than the sum of its proper divisors (2905545).

3868215 is a wasteful number, since it uses less digits than its factorization.

3868215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343.

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

The square root of 3868215 is about 1966.7778217175. Note that the first 3 decimals coincide. The cubic root of 3868215 is about 156.9773047914.

The spelling of 3868215 in words is "three million, eight hundred sixty-eight thousand, two hundred fifteen".