402244442305 has 4 divisors (see below), whose sum is σ = 482693330772. Its totient is φ = 321795553840.

The previous prime is 402244442297. The next prime is 402244442309. The reversal of 402244442305 is 503244442204.

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 184364608129 + 217879834176 = 429377^2 + 466776^2 .

It is not a de Polignac number, because 402244442305 - 2³ = 402244442297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402244442309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40224444226 + ... + 40224444235.

It is an arithmetic number, because the mean of its divisors is an integer number (120673332693).

Almost surely, 2^402244442305 is an apocalyptic number.

It is an amenable number.

402244442305 is a deficient number, since it is larger than the sum of its proper divisors (80448888467).

402244442305 is an equidigital number, since it uses as much as digits as its factorization.

402244442305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80448888466.

The product of its (nonzero) digits is 122880, while the sum is 34.

Adding to 402244442305 its reverse (503244442204), we get a palindrome (905488884509).

The spelling of 402244442305 in words is "four hundred two billion, two hundred forty-four million, four hundred forty-two thousand, three hundred five".