8640365 has 8 divisors (see below), whose sum is σ = 10403448. Its totient is φ = 6888960.

The previous prime is 8640349. The next prime is 8640391. The reversal of 8640365 is 5630468.

It can be written as a sum of positive squares in 4 ways, for example, as 178084 + 8462281 = 422^2 + 2909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8640365 - 2⁴ = 8640349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1196 + ... + 4325.

It is an arithmetic number, because the mean of its divisors is an integer number (1300431).

Almost surely, 2^8640365 is an apocalyptic number.

It is an amenable number.

8640365 is a deficient number, since it is larger than the sum of its proper divisors (1763083).

8640365 is a wasteful number, since it uses less digits than its factorization.

8640365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5839.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 8640365 is about 2939.4497784449. The cubic root of 8640365 is about 205.2000031032.

It can be divided in two parts, 86403 and 65, that added together give a palindrome (86468).

The spelling of 8640365 in words is "eight million, six hundred forty thousand, three hundred sixty-five".