3685509 has 12 divisors (see below), whose sum is σ = 5346016. Its totient is φ = 2446632.

The previous prime is 3685501. The next prime is 3685511. The reversal of 3685509 is 9055863.

It is not a de Polignac number, because 3685509 - 2³ = 3685501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3685501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1824 + ... + 3270.

Almost surely, 2^3685509 is an apocalyptic number.

It is an amenable number.

3685509 is a deficient number, since it is larger than the sum of its proper divisors (1660507).

3685509 is a wasteful number, since it uses less digits than its factorization.

3685509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736 (or 1733 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 3685509 is about 1919.7679547279. The cubic root of 3685509 is about 154.4658547725.

The spelling of 3685509 in words is "three million, six hundred eighty-five thousand, five hundred nine".