40816009 has 8 divisors (see below), whose sum is σ = 46269440. Its totient is φ = 35693136.

The previous prime is 40816003. The next prime is 40816049. The reversal of 40816009 is 90061804.

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 40816009 - 2⁵ = 40815977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40816003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82377 + ... + 82870.

It is an arithmetic number, because the mean of its divisors is an integer number (5783680).

Almost surely, 2^40816009 is an apocalyptic number.

It is an amenable number.

40816009 is a deficient number, since it is larger than the sum of its proper divisors (5453431).

40816009 is a wasteful number, since it uses less digits than its factorization.

40816009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165279.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 40816009 is about 6388.7407992499. The cubic root of 40816009 is about 344.3051448941.

The spelling of 40816009 in words is "forty million, eight hundred sixteen thousand, nine".