8440685 has 24 divisors (see below), whose sum is σ = 11448864. Its totient is φ = 5923680.

The previous prime is 8440673. The next prime is 8440703. The reversal of 8440685 is 5860448.

It is not a de Polignac number, because 8440685 - 2⁴ = 8440669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 101654 + ... + 101736.

It is an arithmetic number, because the mean of its divisors is an integer number (477036).

Almost surely, 2^8440685 is an apocalyptic number.

It is an amenable number.

8440685 is a deficient number, since it is larger than the sum of its proper divisors (3008179).

8440685 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 8440685 = (4845680)₁₁.

8440685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 8440685 is about 2905.2857002367. The cubic root of 8440685 is about 203.6069340817.

The spelling of 8440685 in words is "eight million, four hundred forty thousand, six hundred eighty-five".