40055009 has 8 divisors (see below), whose sum is σ = 42651360. Its totient is φ = 37485376.

The previous prime is 40054999. The next prime is 40055017. The reversal of 40055009 is 90055004.

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 40055009 - 2²⁰ = 39006433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40055089) 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, 3539 + ... + 9624.

It is an arithmetic number, because the mean of its divisors is an integer number (5331420).

Almost surely, 2^40055009 is an apocalyptic number.

It is an amenable number.

40055009 is a deficient number, since it is larger than the sum of its proper divisors (2596351).

40055009 is a wasteful number, since it uses less digits than its factorization.

40055009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13359.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 40055009 is about 6328.9026694997. The cubic root of 40055009 is about 342.1518909687.

The spelling of 40055009 in words is "forty million, fifty-five thousand, nine".