40044409 has 2 divisors, whose sum is σ = 40044410. Its totient is φ = 40044408.

The previous prime is 40044353. The next prime is 40044427. The reversal of 40044409 is 90444004.

40044409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35964009 + 4080400 = 5997^2 + 2020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40044409 is a prime.

It is not a weakly prime, because it can be changed into another prime (40044439) 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 as a sum of consecutive naturals, namely, 20022204 + 20022205.

It is an arithmetic number, because the mean of its divisors is an integer number (20022205).

Almost surely, 2^40044409 is an apocalyptic number.

It is an amenable number.

40044409 is a deficient number, since it is larger than the sum of its proper divisors (1).

40044409 is an equidigital number, since it uses as much as digits as its factorization.

40044409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40044409 is about 6328.0651861371. The cubic root of 40044409 is about 342.1217063958.

The spelling of 40044409 in words is "forty million, forty-four thousand, four hundred nine".