3864221 has 8 divisors (see below), whose sum is σ = 4021920. Its totient is φ = 3708208.

The previous prime is 3864197. The next prime is 3864233. The reversal of 3864221 is 1224683.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3864221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6290 + ... + 6876.

It is an arithmetic number, because the mean of its divisors is an integer number (502740).

Almost surely, 2^3864221 is an apocalyptic number.

It is an amenable number.

3864221 is a deficient number, since it is larger than the sum of its proper divisors (157699).

3864221 is a wasteful number, since it uses less digits than its factorization.

3864221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843.

The product of its digits is 2304, while the sum is 26.

The square root of 3864221 is about 1965.7621931454. The cubic root of 3864221 is about 156.9232589103.

The spelling of 3864221 in words is "three million, eight hundred sixty-four thousand, two hundred twenty-one".