400224224 has 24 divisors (see below), whose sum is σ = 788402160. Its totient is φ = 199995136.

The previous prime is 400224221. The next prime is 400224239. The reversal of 400224224 is 422422004.

It is a junction number, because it is equal to n+sod(n) for n = 400224196 and 400224205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400224221) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 85037 + ... + 89619.

It is an arithmetic number, because the mean of its divisors is an integer number (32850090).

Almost surely, 2^400224224 is an apocalyptic number.

It is an amenable number.

400224224 is a deficient number, since it is larger than the sum of its proper divisors (388177936).

400224224 is a wasteful number, since it uses less digits than its factorization.

400224224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7322 (or 7314 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400224224 is about 20005.6048146513. The cubic root of 400224224 is about 736.9439487242.

Adding to 400224224 its reverse (422422004), we get a palindrome (822646228).

The spelling of 400224224 in words is "four hundred million, two hundred twenty-four thousand, two hundred twenty-four".