3653985 has 16 divisors (see below), whose sum is σ = 6154560. Its totient is φ = 1846080.

The previous prime is 3653981. The next prime is 3653989. The reversal of 3653985 is 5893563.

3653985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3653981) and next prime (3653989).

It is not a de Polignac number, because 3653985 - 2² = 3653981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3653981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6126 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (384660).

Almost surely, 2^3653985 is an apocalyptic number.

It is an amenable number.

3653985 is a deficient number, since it is larger than the sum of its proper divisors (2500575).

3653985 is a wasteful number, since it uses less digits than its factorization.

3653985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12848.

The product of its digits is 97200, while the sum is 39.

The square root of 3653985 is about 1911.5399551147. The cubic root of 3653985 is about 154.0241852160.

The spelling of 3653985 in words is "three million, six hundred fifty-three thousand, nine hundred eighty-five".