3856189 has 4 divisors (see below), whose sum is σ = 3860956. Its totient is φ = 3851424.

The previous prime is 3856187. The next prime is 3856199. The reversal of 3856189 is 9816583.

It is a happy number.

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: 9816583 = 7 ⋅1402369.

It can be written as a sum of positive squares in 2 ways, for example, as 3090564 + 765625 = 1758^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 3856189 - 2¹ = 3856187 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

3856189 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3856187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834 + ... + 2899.

It is an arithmetic number, because the mean of its divisors is an integer number (965239).

Almost surely, 2^3856189 is an apocalyptic number.

It is an amenable number.

3856189 is a deficient number, since it is larger than the sum of its proper divisors (4767).

3856189 is a wasteful number, since it uses less digits than its factorization.

3856189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4766.

The product of its digits is 51840, while the sum is 40.

The square root of 3856189 is about 1963.7181569665. The cubic root of 3856189 is about 156.8144588959.

The spelling of 3856189 in words is "three million, eight hundred fifty-six thousand, one hundred eighty-nine".