3895665 has 16 divisors (see below), whose sum is σ = 6561600. Its totient is φ = 1968192.

The previous prime is 3895603. The next prime is 3895667. The reversal of 3895665 is 5665983.

It is not a de Polignac number, because 3895665 - 2⁹ = 3895153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3895667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6550 + ... + 7119.

It is an arithmetic number, because the mean of its divisors is an integer number (410100).

Almost surely, 2^3895665 is an apocalyptic number.

It is an amenable number.

3895665 is a deficient number, since it is larger than the sum of its proper divisors (2665935).

3895665 is a wasteful number, since it uses less digits than its factorization.

3895665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13696.

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

The square root of 3895665 is about 1973.7439043604. The cubic root of 3895665 is about 157.3477490661.

It can be divided in two parts, 3895 and 665, that added together give a triangular number (4560 = T₉₅).

The spelling of 3895665 in words is "three million, eight hundred ninety-five thousand, six hundred sixty-five".