8090645 has 4 divisors (see below), whose sum is σ = 9708780. Its totient is φ = 6472512.

The previous prime is 8090639. The next prime is 8090647. The reversal of 8090645 is 5460908.

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 5193841 + 2896804 = 2279^2 + 1702^2 .

It is a cyclic number.

It is not a de Polignac number, because 8090645 - 2⁴ = 8090629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8090647) by changing a digit.

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, 809060 + ... + 809069.

It is an arithmetic number, because the mean of its divisors is an integer number (2427195).

Almost surely, 2^8090645 is an apocalyptic number.

It is an amenable number.

8090645 is a deficient number, since it is larger than the sum of its proper divisors (1618135).

8090645 is a wasteful number, since it uses less digits than its factorization.

8090645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618134.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 8090645 is about 2844.4059133675. The cubic root of 8090645 is about 200.7525398673.

The spelling of 8090645 in words is "eight million, ninety thousand, six hundred forty-five".