4405985 has 4 divisors (see below), whose sum is σ = 5287188. Its totient is φ = 3524784.

The previous prime is 4405979. The next prime is 4405991. The reversal of 4405985 is 5895044.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4405979) and next prime (4405991).

It can be written as a sum of positive squares in 2 ways, for example, as 1817104 + 2588881 = 1348^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 4405985 - 2¹⁴ = 4389601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 440594 + ... + 440603.

It is an arithmetic number, because the mean of its divisors is an integer number (1321797).

Almost surely, 2^4405985 is an apocalyptic number.

It is an amenable number.

4405985 is a deficient number, since it is larger than the sum of its proper divisors (881203).

4405985 is an equidigital number, since it uses as much as digits as its factorization.

4405985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881202.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 4405985 is about 2099.0438299378. The cubic root of 4405985 is about 163.9385180009.

It can be divided in two parts, 44059 and 85, that added together give a palindrome (44144).

The spelling of 4405985 in words is "four million, four hundred five thousand, nine hundred eighty-five".