40140709 has 16 divisors (see below), whose sum is σ = 47255040. Its totient is φ = 33387120.

The previous prime is 40140703. The next prime is 40140721. The reversal of 40140709 is 90704104.

It is a cyclic number.

It is not a de Polignac number, because 40140709 - 2⁵ = 40140677 is a prime.

It is a super-3 number, since 3×40140709³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40140703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33694 + ... + 34864.

It is an arithmetic number, because the mean of its divisors is an integer number (2953440).

Almost surely, 2^40140709 is an apocalyptic number.

It is an amenable number.

40140709 is a deficient number, since it is larger than the sum of its proper divisors (7114331).

40140709 is a wasteful number, since it uses less digits than its factorization.

40140709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 40140709 is about 6335.6695778741. The cubic root of 40140709 is about 342.3957350411.

The spelling of 40140709 in words is "forty million, one hundred forty thousand, seven hundred nine".