4405805 has 12 divisors (see below), whose sum is σ = 5618100. Its totient is φ = 3316224.

The previous prime is 4405789. The next prime is 4405829. The reversal of 4405805 is 5085044.

It can be written as a sum of positive squares in 6 ways, for example, as 4 + 4405801 = 2^2 + 2099^2 .

It is not a de Polignac number, because 4405805 - 2⁴ = 4405789 is a prime.

It is a super-2 number, since 2×4405805² = 38822235396050, which contains 22 as substring.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 80 + ... + 2969.

It is an arithmetic number, because the mean of its divisors is an integer number (468175).

Almost surely, 2^4405805 is an apocalyptic number.

It is an amenable number.

4405805 is a deficient number, since it is larger than the sum of its proper divisors (1212295).

4405805 is a wasteful number, since it uses less digits than its factorization.

4405805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088 (or 3071 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 4405805 is about 2099.0009528345. Note that the first 3 decimals coincide. The cubic root of 4405805 is about 163.9362854819.

The spelling of 4405805 in words is "four million, four hundred five thousand, eight hundred five".