3655985 has 16 divisors (see below), whose sum is σ = 4592640. Its totient is φ = 2790720.

The previous prime is 3655957. The next prime is 3655987. The reversal of 3655985 is 5895563.

It is not a de Polignac number, because 3655985 - 2⁶ = 3655921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3655987) 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, 15851 + ... + 16079.

It is an arithmetic number, because the mean of its divisors is an integer number (287040).

Almost surely, 2^3655985 is an apocalyptic number.

It is an amenable number.

3655985 is a deficient number, since it is larger than the sum of its proper divisors (936655).

3655985 is a wasteful number, since it uses less digits than its factorization.

3655985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368.

The product of its digits is 162000, while the sum is 41.

The square root of 3655985 is about 1912.0630219739. The cubic root of 3655985 is about 154.0522816810.

The spelling of 3655985 in words is "three million, six hundred fifty-five thousand, nine hundred eighty-five".