400444444442 has 8 divisors (see below), whose sum is σ = 686476190496. Its totient is φ = 171619047612.

The previous prime is 400444444441. The next prime is 400444444453. The reversal of 400444444442 is 244444444004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 400444444396 and 400444444405.

It is not an unprimeable number, because it can be changed into a prime (400444444441) 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, 14301587288 + ... + 14301587315.

It is an arithmetic number, because the mean of its divisors is an integer number (85809523812).

Almost surely, 2^400444444442 is an apocalyptic number.

400444444442 is a deficient number, since it is larger than the sum of its proper divisors (286031746054).

400444444442 is a wasteful number, since it uses less digits than its factorization.

400444444442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28603174612.

The product of its (nonzero) digits is 524288, while the sum is 38.

Adding to 400444444442 its reverse (244444444004), we get a palindrome (644888888446).

The spelling of 400444444442 in words is "four hundred billion, four hundred forty-four million, four hundred forty-four thousand, four hundred forty-two".