400123222 has 8 divisors (see below), whose sum is σ = 600406200. Its totient is φ = 199987824.

The previous prime is 400123219. The next prime is 400123277. The reversal of 400123222 is 222321004.

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

It is a super-2 number, since 2×400123222² = 320197185567322568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400123196 and 400123205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29847 + ... + 41122.

It is an arithmetic number, because the mean of its divisors is an integer number (75050775).

Almost surely, 2^400123222 is an apocalyptic number.

400123222 is a deficient number, since it is larger than the sum of its proper divisors (200282978).

400123222 is a wasteful number, since it uses less digits than its factorization.

400123222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73790.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400123222 is about 20003.0803127918. The cubic root of 400123222 is about 736.8819509153.

Adding to 400123222 its reverse (222321004), we get a palindrome (622444226).

It can be divided in two parts, 40012 and 3222, that added together give a palindrome (43234).

The spelling of 400123222 in words is "four hundred million, one hundred twenty-three thousand, two hundred twenty-two".