40086909 has 6 divisors (see below), whose sum is σ = 57903326. Its totient is φ = 26724600.

The previous prime is 40086881. The next prime is 40086913. The reversal of 40086909 is 90968004.

It can be written as a sum of positive squares in only one way, i.e., 28676025 + 11410884 = 5355^2 + 3378^2 .

It is not a de Polignac number, because 40086909 - 2¹⁷ = 39955837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40086929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2227042 + ... + 2227059.

Almost surely, 2^40086909 is an apocalyptic number.

It is an amenable number.

40086909 is a deficient number, since it is larger than the sum of its proper divisors (17816417).

40086909 is a wasteful number, since it uses less digits than its factorization.

40086909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4454107 (or 4454104 counting only the distinct ones).

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

The square root of 40086909 is about 6331.4223520470. The cubic root of 40086909 is about 342.2426973321.

The spelling of 40086909 in words is "forty million, eighty-six thousand, nine hundred nine".