3189681 has 36 divisors (see below), whose sum is σ = 5290740. Its totient is φ = 1848000.

The previous prime is 3189679. The next prime is 3189689. The reversal of 3189681 is 1869813.

3189681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2509056 + 680625 = 1584^2 + 825^2 .

It is not a de Polignac number, because 3189681 - 2¹ = 3189679 is a prime.

It is a super-2 number, since 2×3189681² = 20348129763522, which contains 22 as substring.

Its product of digits (10368) is a multiple of the sum of its prime divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3189689) 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 35 ways as a sum of consecutive naturals, for example, 31531 + ... + 31631.

It is an arithmetic number, because the mean of its divisors is an integer number (146965).

Almost surely, 2^3189681 is an apocalyptic number.

It is an amenable number.

3189681 is a deficient number, since it is larger than the sum of its proper divisors (2101059).

3189681 is a wasteful number, since it uses less digits than its factorization.

3189681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 144 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 3189681 is about 1785.9678048610. The cubic root of 3189681 is about 147.2026913743.

It can be divided in two parts, 318 and 9681, that added together give a palindrome (9999).

The spelling of 3189681 in words is "three million, one hundred eighty-nine thousand, six hundred eighty-one".