4040909 has 4 divisors (see below), whose sum is σ = 4081020. Its totient is φ = 4000800.

The previous prime is 4040903. The next prime is 4040921. The reversal of 4040909 is 9090404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3988009 + 52900 = 1997^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 4040909 - 2⁸ = 4040653 is a prime.

It is a Duffinian number.

4040909 is a modest number, since divided by 909 gives 404 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19904 + ... + 20105.

It is an arithmetic number, because the mean of its divisors is an integer number (1020255).

Almost surely, 2^4040909 is an apocalyptic number.

It is an amenable number.

4040909 is a deficient number, since it is larger than the sum of its proper divisors (40111).

4040909 is a wasteful number, since it uses less digits than its factorization.

4040909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40110.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 4040909 is about 2010.2012337077. The cubic root of 4040909 is about 159.2794290014.

The spelling of 4040909 in words is "four million, forty thousand, nine hundred nine".