400004222 has 16 divisors (see below), whose sum is σ = 620784000. Its totient is φ = 193105920.

The previous prime is 400004219. The next prime is 400004239. The reversal of 400004222 is 222400004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400004197 and 400004206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20654 + ... + 35022.

It is an arithmetic number, because the mean of its divisors is an integer number (38799000).

Almost surely, 2^400004222 is an apocalyptic number.

400004222 is a deficient number, since it is larger than the sum of its proper divisors (220779778).

400004222 is a wasteful number, since it uses less digits than its factorization.

400004222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14851.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 400004222 is about 20000.1055497215. The cubic root of 400004222 is about 736.8088920491.

Adding to 400004222 its reverse (222400004), we get a palindrome (622404226).

It can be divided in two parts, 400004 and 222, that multiplied together give a palindrome (88800888).

The spelling of 400004222 in words is "four hundred million, four thousand, two hundred twenty-two".