40444405 has 4 divisors (see below), whose sum is σ = 48533292. Its totient is φ = 32355520.

The previous prime is 40444399. The next prime is 40444421. The reversal of 40444405 is 50444404.

40444405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7001316 + 33443089 = 2646^2 + 5783^2 .

It is not a de Polignac number, because 40444405 - 2¹¹ = 40442357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40444405.

It is a congruent number.

It is an unprimeable number.

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, 4044436 + ... + 4044445.

It is an arithmetic number, because the mean of its divisors is an integer number (12133323).

Almost surely, 2^40444405 is an apocalyptic number.

It is an amenable number.

40444405 is a deficient number, since it is larger than the sum of its proper divisors (8088887).

40444405 is an equidigital number, since it uses as much as digits as its factorization.

40444405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088886.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 40444405 is about 6359.5915749362. The cubic root of 40444405 is about 343.2570640485.

Adding to 40444405 its reverse (50444404), we get a palindrome (90888809).

Subtracting 40444405 from its reverse (50444404), we obtain a palindrome (9999999).

The spelling of 40444405 in words is "forty million, four hundred forty-four thousand, four hundred five".