440442311242 has 4 divisors (see below), whose sum is σ = 660663466866. Its totient is φ = 220221155620.

The previous prime is 440442311237. The next prime is 440442311249. The reversal of 440442311242 is 242113244044.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 429928064721 + 10514246521 = 655689^2 + 102539^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (440442311249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110577809 + ... + 110110577812.

Almost surely, 2^440442311242 is an apocalyptic number.

440442311242 is a deficient number, since it is larger than the sum of its proper divisors (220221155624).

440442311242 is a wasteful number, since it uses less digits than its factorization.

440442311242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220221155623.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 440442311242 its reverse (242113244044), we get a palindrome (682555555286).

The spelling of 440442311242 in words is "four hundred forty billion, four hundred forty-two million, three hundred eleven thousand, two hundred forty-two".