400442442442 has 16 divisors (see below), whose sum is σ = 686575088640. Its totient is φ = 171592607088.

The previous prime is 400442442403. The next prime is 400442442473. The reversal of 400442442442 is 244244244004.

It is a junction number, because it is equal to n+sod(n) for n = 400442442398 and 400442442407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2034453 + ... + 2222584.

It is an arithmetic number, because the mean of its divisors is an integer number (42910943040).

Almost surely, 2^400442442442 is an apocalyptic number.

400442442442 is a deficient number, since it is larger than the sum of its proper divisors (286132646198).

400442442442 is a wasteful number, since it uses less digits than its factorization.

400442442442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263765.

The product of its (nonzero) digits is 131072, while the sum is 34.

Adding to 400442442442 its reverse (244244244004), we get a palindrome (644686686446).

The spelling of 400442442442 in words is "four hundred billion, four hundred forty-two million, four hundred forty-two thousand, four hundred forty-two".