3188861 has 6 divisors (see below), whose sum is σ = 3453210. Its totient is φ = 2943408.

The previous prime is 3188833. The next prime is 3188879. The reversal of 3188861 is 1688813.

It is a happy number.

3188861 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 3 ways, for example, as 319225 + 2869636 = 565^2 + 1694^2 .

It is not a de Polignac number, because 3188861 - 2¹⁸ = 2926717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3188821) 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 5 ways as a sum of consecutive naturals, for example, 9266 + ... + 9603.

It is an arithmetic number, because the mean of its divisors is an integer number (575535).

Almost surely, 2^3188861 is an apocalyptic number.

It is an amenable number.

3188861 is a deficient number, since it is larger than the sum of its proper divisors (264349).

3188861 is a wasteful number, since it uses less digits than its factorization.

3188861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18895 (or 18882 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 3188861 is about 1785.7382226967. The cubic root of 3188861 is about 147.1900760530.

The spelling of 3188861 in words is "three million, one hundred eighty-eight thousand, eight hundred sixty-one".