4405665 has 16 divisors (see below), whose sum is σ = 7690176. Its totient is φ = 2136000.

The previous prime is 4405637. The next prime is 4405679. The reversal of 4405665 is 5665044.

It is not a de Polignac number, because 4405665 - 2⁵ = 4405633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13186 + ... + 13515.

It is an arithmetic number, because the mean of its divisors is an integer number (480636).

Almost surely, 2^4405665 is an apocalyptic number.

It is an amenable number.

4405665 is a deficient number, since it is larger than the sum of its proper divisors (3284511).

4405665 is a wasteful number, since it uses less digits than its factorization.

4405665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26720.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 4405665 is about 2098.9676033708. The cubic root of 4405665 is about 163.9345490362.

It can be divided in two parts, 440 and 5665, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 4405665 in words is "four million, four hundred five thousand, six hundred sixty-five".