4040865 has 12 divisors (see below), whose sum is σ = 7004244. Its totient is φ = 2155104.

The previous prime is 4040833. The next prime is 4040873. The reversal of 4040865 is 5680404.

4040865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1096209 + 2944656 = 1047^2 + 1716^2 .

It is not a de Polignac number, because 4040865 - 2⁵ = 4040833 is a prime.

4040865 is a lucky 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 11 ways as a sum of consecutive naturals, for example, 44854 + ... + 44943.

It is an arithmetic number, because the mean of its divisors is an integer number (583687).

Almost surely, 2^4040865 is an apocalyptic number.

4040865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4040865 is a deficient number, since it is larger than the sum of its proper divisors (2963379).

4040865 is a wasteful number, since it uses less digits than its factorization.

4040865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89808 (or 89805 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 4040865 is about 2010.1902895000. The cubic root of 4040865 is about 159.2788508872.

The spelling of 4040865 in words is "four million, forty thousand, eight hundred sixty-five".