3655869 has 16 divisors (see below), whose sum is σ = 5626368. Its totient is φ = 2068272.

The previous prime is 3655849. The next prime is 3655877. The reversal of 3655869 is 9685563.

It is not a de Polignac number, because 3655869 - 2⁵ = 3655837 is a prime.

It is a super-2 number, since 2×3655869² = 26730756290322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3655869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655849) 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, 1434 + ... + 3060.

It is an arithmetic number, because the mean of its divisors is an integer number (351648).

Almost surely, 2^3655869 is an apocalyptic number.

It is an amenable number.

3655869 is a deficient number, since it is larger than the sum of its proper divisors (1970499).

3655869 is a wasteful number, since it uses less digits than its factorization.

3655869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744.

The product of its digits is 194400, while the sum is 42.

The square root of 3655869 is about 1912.0326880051. The cubic root of 3655869 is about 154.0506523660.

The spelling of 3655869 in words is "three million, six hundred fifty-five thousand, eight hundred sixty-nine".