4040005 has 8 divisors (see below), whose sum is σ = 4881024. Its totient is φ = 3210000.

The previous prime is 4039991. The next prime is 4040009. The reversal of 4040005 is 5000404.

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

It is not a de Polignac number, because 4040005 - 2¹⁹ = 3515717 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 (4040009) 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, 1921 + ... + 3430.

It is an arithmetic number, because the mean of its divisors is an integer number (610128).

Almost surely, 2^4040005 is an apocalyptic number.

It is an amenable number.

4040005 is a deficient number, since it is larger than the sum of its proper divisors (841019).

4040005 is a wasteful number, since it uses less digits than its factorization.

4040005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5507.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 4040005 is about 2009.9763680203. The cubic root of 4040005 is about 159.2675505402.

Adding to 4040005 its reverse (5000404), we get a palindrome (9040409).

The spelling of 4040005 in words is "four million, forty thousand, five".