8809865 has 4 divisors (see below), whose sum is σ = 10571844. Its totient is φ = 7047888.

The previous prime is 8809861. The next prime is 8809877. The reversal of 8809865 is 5689088.

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 3254416 + 5555449 = 1804^2 + 2357^2 .

It is a cyclic number.

It is not a de Polignac number, because 8809865 - 2² = 8809861 is a prime.

It is a super-2 number, since 2×8809865² = 155227442636450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8809861) by changing a digit.

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, 880982 + ... + 880991.

It is an arithmetic number, because the mean of its divisors is an integer number (2642961).

Almost surely, 2^8809865 is an apocalyptic number.

It is an amenable number.

8809865 is a deficient number, since it is larger than the sum of its proper divisors (1761979).

8809865 is a wasteful number, since it uses less digits than its factorization.

8809865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761978.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 8809865 is about 2968.1416745162. The cubic root of 8809865 is about 206.5331415793.

The spelling of 8809865 in words is "eight million, eight hundred nine thousand, eight hundred sixty-five".