40065009 has 8 divisors (see below), whose sum is σ = 54556800. Its totient is φ = 26141616.

The previous prime is 40065007. The next prime is 40065017. The reversal of 40065009 is 90056004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40065009 - 2¹ = 40065007 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40065009.

It is not an unprimeable number, because it can be changed into a prime (40065001) 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, 141934 + ... + 142215.

It is an arithmetic number, because the mean of its divisors is an integer number (6819600).

Almost surely, 2^40065009 is an apocalyptic number.

It is an amenable number.

40065009 is a deficient number, since it is larger than the sum of its proper divisors (14491791).

40065009 is a wasteful number, since it uses less digits than its factorization.

40065009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284199.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 40065009 is about 6329.6926465667. The cubic root of 40065009 is about 342.1803620996.

The spelling of 40065009 in words is "forty million, sixty-five thousand, nine".