400442442443 has 4 divisors (see below), whose sum is σ = 402679551240. Its totient is φ = 398205333648.

The previous prime is 400442442403. The next prime is 400442442473. The reversal of 400442442443 is 344244244004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400442442443 - 2²⁰ = 400441393867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400442442403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118554130 + ... + 1118554487.

It is an arithmetic number, because the mean of its divisors is an integer number (100669887810).

Almost surely, 2^400442442443 is an apocalyptic number.

400442442443 is a deficient number, since it is larger than the sum of its proper divisors (2237108797).

400442442443 is a wasteful number, since it uses less digits than its factorization.

400442442443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237108796.

The product of its (nonzero) digits is 196608, while the sum is 35.

Adding to 400442442443 its reverse (344244244004), we get a palindrome (744686686447).

The spelling of 400442442443 in words is "four hundred billion, four hundred forty-two million, four hundred forty-two thousand, four hundred forty-three".