40511709 has 12 divisors (see below), whose sum is σ = 66876576. Its totient is φ = 23149512.

The previous prime is 40511687. The next prime is 40511729. The reversal of 40511709 is 90711504.

40511709 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 40511709 - 2⁸ = 40511453 is a prime.

It is a super-2 number, since 2×40511709² = 3282397132201362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40511729) 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 11 ways as a sum of consecutive naturals, for example, 321459 + ... + 321584.

It is an arithmetic number, because the mean of its divisors is an integer number (5573048).

Almost surely, 2^40511709 is an apocalyptic number.

It is an amenable number.

40511709 is a deficient number, since it is larger than the sum of its proper divisors (26364867).

40511709 is a wasteful number, since it uses less digits than its factorization.

40511709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643056 (or 643053 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 40511709 is about 6364.8809101192. The cubic root of 40511709 is about 343.4473645378.

The spelling of 40511709 in words is "forty million, five hundred eleven thousand, seven hundred nine".