3820865 has 16 divisors (see below), whose sum is σ = 4769280. Its totient is φ = 2936640.

The previous prime is 3820853. The next prime is 3820867. The reversal of 3820865 is 5680283.

It is not a de Polignac number, because 3820865 - 2⁴ = 3820849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3820867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16571 + ... + 16799.

It is an arithmetic number, because the mean of its divisors is an integer number (298080).

Almost surely, 2^3820865 is an apocalyptic number.

It is an amenable number.

3820865 is a deficient number, since it is larger than the sum of its proper divisors (948415).

3820865 is a wasteful number, since it uses less digits than its factorization.

3820865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 3820865 is about 1954.7033022942. The cubic root of 3820865 is about 156.3341647894.

The spelling of 3820865 in words is "three million, eight hundred twenty thousand, eight hundred sixty-five".