3609845 has 8 divisors (see below), whose sum is σ = 4437720. Its totient is φ = 2817280.

The previous prime is 3609821. The next prime is 3609847. The reversal of 3609845 is 5489063.

It can be written as a sum of positive squares in 4 ways, for example, as 97969 + 3511876 = 313^2 + 1874^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3609845 - 2¹⁶ = 3544309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3609847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8600 + ... + 9009.

It is an arithmetic number, because the mean of its divisors is an integer number (554715).

Almost surely, 2^3609845 is an apocalyptic number.

It is an amenable number.

3609845 is a deficient number, since it is larger than the sum of its proper divisors (827875).

3609845 is a wasteful number, since it uses less digits than its factorization.

3609845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17655.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 3609845 is about 1899.9592100885. The cubic root of 3609845 is about 153.4014688785.

The spelling of 3609845 in words is "three million, six hundred nine thousand, eight hundred forty-five".