400222222 has 16 divisors (see below), whose sum is σ = 611091792. Its totient is φ = 196542720.

The previous prime is 400222189. The next prime is 400222247. The reversal of 400222222 is 222222004.

400222222 is a modest number, since divided by 22222 gives 4002 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 400222196 and 400222205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43072 + ... + 51532.

It is an arithmetic number, because the mean of its divisors is an integer number (38193237).

Almost surely, 2^400222222 is an apocalyptic number.

400222222 is a deficient number, since it is larger than the sum of its proper divisors (210869570).

400222222 is a wasteful number, since it uses less digits than its factorization.

400222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8883.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 400222222 is about 20005.5547786109. The cubic root of 400222222 is about 736.9427199428.

Adding to 400222222 its reverse (222222004), we get a palindrome (622444226).

The spelling of 400222222 in words is "four hundred million, two hundred twenty-two thousand, two hundred twenty-two".