400444222242 has 8 divisors (see below), whose sum is σ = 800888444496. Its totient is φ = 133481407412.

The previous prime is 400444222237. The next prime is 400444222261. The reversal of 400444222242 is 242222444004.

It is a happy number.

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

400444222242 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33370351848 + ... + 33370351859.

It is an arithmetic number, because the mean of its divisors is an integer number (100111055562).

Almost surely, 2^400444222242 is an apocalyptic number.

400444222242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400444222242 is a wasteful number, since it uses less digits than its factorization.

400444222242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66740703712.

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 400444222242 its reverse (242222444004), we get a palindrome (642666666246).

The spelling of 400444222242 in words is "four hundred billion, four hundred forty-four million, two hundred twenty-two thousand, two hundred forty-two".