40534509 has 16 divisors (see below), whose sum is σ = 55616000. Its totient is φ = 26245296.

The previous prime is 40534493. The next prime is 40534519. The reversal of 40534509 is 90543504.

40534509 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 40534509 - 2⁴ = 40534493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40534519) 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 15 ways as a sum of consecutive naturals, for example, 24882 + ... + 26460.

It is an arithmetic number, because the mean of its divisors is an integer number (3476000).

Almost surely, 2^40534509 is an apocalyptic number.

It is an amenable number.

40534509 is a deficient number, since it is larger than the sum of its proper divisors (15081491).

40534509 is a wasteful number, since it uses less digits than its factorization.

40534509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 40534509 is about 6366.6717364727. The cubic root of 40534509 is about 343.5117832087.

The spelling of 40534509 in words is "forty million, five hundred thirty-four thousand, five hundred nine".