40065685 has 32 divisors (see below), whose sum is σ = 56391552. Its totient is φ = 27002880.

The previous prime is 40065679. The next prime is 40065689. The reversal of 40065685 is 58656004.

40065685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40065685 - 2⁹ = 40065173 is a prime.

It is a super-2 number, since 2×40065685² = 3210518229038450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40065685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40065689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67962 + ... + 68548.

It is an arithmetic number, because the mean of its divisors is an integer number (1762236).

Almost surely, 2^40065685 is an apocalyptic number.

It is an amenable number.

40065685 is a deficient number, since it is larger than the sum of its proper divisors (16325867).

40065685 is a wasteful number, since it uses less digits than its factorization.

40065685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 40065685 is about 6329.7460454587. The cubic root of 40065685 is about 342.1822865771.

The spelling of 40065685 in words is "forty million, sixty-five thousand, six hundred eighty-five".