4405806 has 32 divisors (see below), whose sum is σ = 9918720. Its totient is φ = 1449432.

The previous prime is 4405789. The next prime is 4405829. The reversal of 4405806 is 6085044.

4405806 = 1048² + 1049² + ... + 1051².

It is a super-2 number, since 2×4405806² = 38822253019272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 4405806.

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 15 ways as a sum of consecutive naturals, for example, 3991 + ... + 4973.

It is an arithmetic number, because the mean of its divisors is an integer number (309960).

Almost surely, 2^4405806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4405806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4959360).

4405806 is an abundant number, since it is smaller than the sum of its proper divisors (5512914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4405806 is a wasteful number, since it uses less digits than its factorization.

4405806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077 (or 1071 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 4405806 is about 2099.0011910430. The cubic root of 4405806 is about 163.9362978850.

The spelling of 4405806 in words is "four million, four hundred five thousand, eight hundred six".