400004440445 has 8 divisors (see below), whose sum is σ = 480011517240. Its totient is φ = 319999426560.

The previous prime is 400004440427. The next prime is 400004440447. The reversal of 400004440445 is 544044400004.

It can be written as a sum of positive squares in 4 ways, for example, as 29976767044 + 370027673401 = 173138^2 + 608299^2 .

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

It is not a de Polignac number, because 400004440445 - 2⁸ = 400004440189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400004440447) 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, 51080 + ... + 895889.

It is an arithmetic number, because the mean of its divisors is an integer number (60001439655).

Almost surely, 2^400004440445 is an apocalyptic number.

It is an amenable number.

400004440445 is a deficient number, since it is larger than the sum of its proper divisors (80007076795).

400004440445 is an equidigital number, since it uses as much as digits as its factorization.

400004440445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031455.

The product of its (nonzero) digits is 20480, while the sum is 29.

Adding to 400004440445 its reverse (544044400004), we get a palindrome (944048840449).

The spelling of 400004440445 in words is "four hundred billion, four million, four hundred forty thousand, four hundred forty-five".