40089609 has 12 divisors (see below), whose sum is σ = 66179776. Its totient is φ = 22908312.

The previous prime is 40089607. The next prime is 40089613. The reversal of 40089609 is 90698004.

40089609 is a `hidden beast` number, since 40 + 0 + 8 + 9 + 609 = 666.

It is not a de Polignac number, because 40089609 - 2¹ = 40089607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40089607) 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 11 ways as a sum of consecutive naturals, for example, 318109 + ... + 318234.

Almost surely, 2^40089609 is an apocalyptic number.

It is an amenable number.

40089609 is a deficient number, since it is larger than the sum of its proper divisors (26090167).

40089609 is a wasteful number, since it uses less digits than its factorization.

40089609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636356 (or 636353 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 40089609 is about 6331.6355706879. The cubic root of 40089609 is about 342.2503809256.

It can be divided in two parts, 400 and 89609, that added together give a palindrome (90009).

The spelling of 40089609 in words is "forty million, eighty-nine thousand, six hundred nine".