400422420442 has 48 divisors (see below), whose sum is σ = 729428970816. Its totient is φ = 163855683200.

The previous prime is 400422420421. The next prime is 400422420491. The reversal of 400422420442 is 244024224004.

It is a super-2 number, since 2×400422420442² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 400422420442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2021284 + ... + 2210527.

It is an arithmetic number, because the mean of its divisors is an integer number (15196436892).

Almost surely, 2^400422420442 is an apocalyptic number.

400422420442 is a deficient number, since it is larger than the sum of its proper divisors (329006550374).

400422420442 is a wasteful number, since it uses less digits than its factorization.

400422420442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4231875 (or 4231864 counting only the distinct ones).

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

Adding to 400422420442 its reverse (244024224004), we get a palindrome (644446644446).

The spelling of 400422420442 in words is "four hundred billion, four hundred twenty-two million, four hundred twenty thousand, four hundred forty-two".