40044405 has 16 divisors (see below), whose sum is σ = 66138624. Its totient is φ = 20667840.

The previous prime is 40044353. The next prime is 40044409. The reversal of 40044405 is 50444004.

40044405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40044405 - 2⁶ = 40044341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40044409) 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 15 ways as a sum of consecutive naturals, for example, 42594 + ... + 43523.

It is an arithmetic number, because the mean of its divisors is an integer number (4133664).

Almost surely, 2^40044405 is an apocalyptic number.

It is an amenable number.

40044405 is a deficient number, since it is larger than the sum of its proper divisors (26094219).

40044405 is a wasteful number, since it uses less digits than its factorization.

40044405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86156.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40044405 is about 6328.0648700847. The cubic root of 40044405 is about 342.1216950044.

Adding to 40044405 its reverse (50444004), we get a palindrome (90488409).

The spelling of 40044405 in words is "forty million, forty-four thousand, four hundred five".