400420404244 has 12 divisors (see below), whose sum is σ = 800840808544. Its totient is φ = 171608744664.

The previous prime is 400420404203. The next prime is 400420404257. The reversal of 400420404244 is 442404024004.

400420404244 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 14300728723 = 400420404244 / (4 + 0 + 0 + 4 + 2 + 0 + 4 + 0 + 4 + 2 + 4 + 4).

It is a congruent 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, 7150364334 + ... + 7150364389.

Almost surely, 2^400420404244 is an apocalyptic number.

It is an amenable number.

400420404244 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.

400420404244 is a wasteful number, since it uses less digits than its factorization.

400420404244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14300728734 (or 14300728732 counting only the distinct ones).

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

Adding to 400420404244 its reverse (442404024004), we get a palindrome (842824428248).

The spelling of 400420404244 in words is "four hundred billion, four hundred twenty million, four hundred four thousand, two hundred forty-four".