40535209 has 8 divisors (see below), whose sum is σ = 47621952. Its totient is φ = 34015440.

The previous prime is 40535207. The next prime is 40535213. The reversal of 40535209 is 90253504.

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

It is a cyclic number.

It is not a de Polignac number, because 40535209 - 2¹ = 40535207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40535203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141589 + ... + 141874.

It is an arithmetic number, because the mean of its divisors is an integer number (5952744).

Almost surely, 2^40535209 is an apocalyptic number.

It is an amenable number.

40535209 is a deficient number, since it is larger than the sum of its proper divisors (7086743).

40535209 is a wasteful number, since it uses less digits than its factorization.

40535209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283487.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 40535209 is about 6366.7267100136. The cubic root of 40535209 is about 343.5137605927.

The spelling of 40535209 in words is "forty million, five hundred thirty-five thousand, two hundred nine".