4089445 has 4 divisors (see below), whose sum is σ = 4907340. Its totient is φ = 3271552.

The previous prime is 4089439. The next prime is 4089473. The reversal of 4089445 is 5449804.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1532644 + 2556801 = 1238^2 + 1599^2 .

It is a cyclic number.

It is not a de Polignac number, because 4089445 - 2⁵ = 4089413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4089445.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 408940 + ... + 408949.

It is an arithmetic number, because the mean of its divisors is an integer number (1226835).

Almost surely, 2^4089445 is an apocalyptic number.

It is an amenable number.

4089445 is a deficient number, since it is larger than the sum of its proper divisors (817895).

4089445 is an equidigital number, since it uses as much as digits as its factorization.

4089445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817894.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 4089445 is about 2022.2376220415. The cubic root of 4089445 is about 159.9146028664.

The spelling of 4089445 in words is "four million, eighty-nine thousand, four hundred forty-five".