8440873065 has 48 divisors (see below), whose sum is σ = 15531064848. Its totient is φ = 4226162688.

The previous prime is 8440873033. The next prime is 8440873069. The reversal of 8440873065 is 5603780448.

It can be written as a sum of positive squares in 8 ways, for example, as 184606569 + 8256266496 = 13587^2 + 90864^2 .

It is not a de Polignac number, because 8440873065 - 2⁵ = 8440873033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8440873065.

It is not an unprimeable number, because it can be changed into a prime (8440873069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 289809 + ... + 317601.

It is an arithmetic number, because the mean of its divisors is an integer number (323563851).

Almost surely, 2^8440873065 is an apocalyptic number.

8440873065 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8440873065 is a deficient number, since it is larger than the sum of its proper divisors (7090191783).

8440873065 is a wasteful number, since it uses less digits than its factorization.

8440873065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28218 (or 28215 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 8440873065 is about 91874.2241599895. The cubic root of 8440873065 is about 2036.0844624385.

The spelling of 8440873065 in words is "eight billion, four hundred forty million, eight hundred seventy-three thousand, sixty-five".