2189685 has 32 divisors (see below), whose sum is σ = 3843072. Its totient is φ = 1059840.

The previous prime is 2189647. The next prime is 2189699. The reversal of 2189685 is 5869812.

2189685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2189685 - 2¹⁶ = 2124149 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 7767 + ... + 8043.

It is an arithmetic number, because the mean of its divisors is an integer number (120096).

2^2189685 is an apocalyptic number.

It is an amenable number.

2189685 is a deficient number, since it is larger than the sum of its proper divisors (1653387).

2189685 is a wasteful number, since it uses less digits than its factorization.

2189685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333.

The product of its digits is 34560, while the sum is 39.

The square root of 2189685 is about 1479.7584262304. The cubic root of 2189685 is about 129.8555594955.

The spelling of 2189685 in words is "two million, one hundred eighty-nine thousand, six hundred eighty-five".