4089605 has 16 divisors (see below), whose sum is σ = 5597424. Its totient is φ = 2841600.

The previous prime is 4089599. The next prime is 4089619. The reversal of 4089605 is 5069804.

It can be written as a sum of positive squares in 8 ways, for example, as 113569 + 3976036 = 337^2 + 1994^2 .

It is not a de Polignac number, because 4089605 - 2²⁰ = 3041029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 746 + ... + 2955.

It is an arithmetic number, because the mean of its divisors is an integer number (349839).

Almost surely, 2^4089605 is an apocalyptic number.

It is an amenable number.

4089605 is a deficient number, since it is larger than the sum of its proper divisors (1507819).

4089605 is a wasteful number, since it uses less digits than its factorization.

4089605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3736.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 4089605 is about 2022.2771817928. The cubic root of 4089605 is about 159.9166883982.

The spelling of 4089605 in words is "four million, eighty-nine thousand, six hundred five".