3689665 has 16 divisors (see below), whose sum is σ = 5091840. Its totient is φ = 2514240.

The previous prime is 3689633. The next prime is 3689669. The reversal of 3689665 is 5669863.

It is not a de Polignac number, because 3689665 - 2⁵ = 3689633 is a prime.

It is a super-2 number, since 2×3689665² = 27227255624450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3689669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9291 + ... + 9679.

It is an arithmetic number, because the mean of its divisors is an integer number (318240).

Almost surely, 2^3689665 is an apocalyptic number.

3689665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3689665 is a deficient number, since it is larger than the sum of its proper divisors (1402175).

3689665 is a wasteful number, since it uses less digits than its factorization.

3689665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672.

The product of its digits is 233280, while the sum is 43.

The square root of 3689665 is about 1920.8500722336. The cubic root of 3689665 is about 154.5238946017.

The spelling of 3689665 in words is "three million, six hundred eighty-nine thousand, six hundred sixty-five".