40409785 has 16 divisors (see below), whose sum is σ = 52416000. Its totient is φ = 29730240.

The previous prime is 40409779. The next prime is 40409839. The reversal of 40409785 is 58790404.

40409785 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 40409785 - 2⁵ = 40409753 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19216 + ... + 21214.

It is an arithmetic number, because the mean of its divisors is an integer number (3276000).

Almost surely, 2^40409785 is an apocalyptic number.

It is an amenable number.

40409785 is a deficient number, since it is larger than the sum of its proper divisors (12006215).

40409785 is a wasteful number, since it uses less digits than its factorization.

40409785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 40409785 is about 6356.8691193071. The cubic root of 40409785 is about 343.1590945691.

The spelling of 40409785 in words is "forty million, four hundred nine thousand, seven hundred eighty-five".