8378565 has 16 divisors (see below), whose sum is σ = 14437248. Its totient is φ = 4124736.

The previous prime is 8378561. The next prime is 8378567. The reversal of 8378565 is 5658738.

It is not a de Polignac number, because 8378565 - 2² = 8378561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8378561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21289 + ... + 21678.

It is an arithmetic number, because the mean of its divisors is an integer number (902328).

Almost surely, 2^8378565 is an apocalyptic number.

It is an amenable number.

8378565 is a deficient number, since it is larger than the sum of its proper divisors (6058683).

8378565 is a wasteful number, since it uses less digits than its factorization.

8378565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42988.

The product of its digits is 201600, while the sum is 42.

The square root of 8378565 is about 2894.5750983521. The cubic root of 8378565 is about 203.1062156988.

The spelling of 8378565 in words is "eight million, three hundred seventy-eight thousand, five hundred sixty-five".