40865818 has 16 divisors (see below), whose sum is σ = 70447104. Its totient is φ = 17416080.

The previous prime is 40865813. The next prime is 40865821. The reversal of 40865818 is 81856804.

It is not an unprimeable number, because it can be changed into a prime (40865813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5530 + ... + 10597.

It is an arithmetic number, because the mean of its divisors is an integer number (4402944).

Almost surely, 2^40865818 is an apocalyptic number.

40865818 is a deficient number, since it is larger than the sum of its proper divisors (29581286).

40865818 is a wasteful number, since it uses less digits than its factorization.

40865818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16317.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 40865818 is about 6392.6377967158. The cubic root of 40865818 is about 344.4451432598.

The spelling of 40865818 in words is "forty million, eight hundred sixty-five thousand, eight hundred eighteen".