400442220442 has 16 divisors (see below), whose sum is σ = 676406801664. Its totient is φ = 176147604000.

The previous prime is 400442220419. The next prime is 400442220449. The reversal of 400442220442 is 244022244004.

It is a self number, because there is not a number n which added to its sum of digits gives 400442220442.

It is not an unprimeable number, because it can be changed into a prime (400442220449) 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, 293578659 + ... + 293580022.

It is an arithmetic number, because the mean of its divisors is an integer number (42275425104).

Almost surely, 2^400442220442 is an apocalyptic number.

400442220442 is a deficient number, since it is larger than the sum of its proper divisors (275964581222).

400442220442 is a wasteful number, since it uses less digits than its factorization.

400442220442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587158725.

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 400442220442 its reverse (244022244004), we get a palindrome (644464464446).

The spelling of 400442220442 in words is "four hundred billion, four hundred forty-two million, two hundred twenty thousand, four hundred forty-two".