400444420442 has 16 divisors (see below), whose sum is σ = 661760540064. Its totient is φ = 180218010000.

The previous prime is 400444420399. The next prime is 400444420469. The reversal of 400444420442 is 244024444004.

It is a junction number, because it is equal to n+sod(n) for n = 400444420399 and 400444420408.

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, 90106784 + ... + 90111227.

It is an arithmetic number, because the mean of its divisors is an integer number (41360033754).

Almost surely, 2^400444420442 is an apocalyptic number.

400444420442 is a deficient number, since it is larger than the sum of its proper divisors (261316119622).

400444420442 is a wasteful number, since it uses less digits than its factorization.

400444420442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180218125.

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 400444420442 its reverse (244024444004), we get a palindrome (644468864446).

The spelling of 400444420442 in words is "four hundred billion, four hundred forty-four million, four hundred twenty thousand, four hundred forty-two".