400002224 has 10 divisors (see below), whose sum is σ = 775004340. Its totient is φ = 200001104.

The previous prime is 400002221. The next prime is 400002247. The reversal of 400002224 is 422200004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400002199 and 400002208.

It is not an unprimeable number, because it can be changed into a prime (400002221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500054 + ... + 12500085.

It is an arithmetic number, because the mean of its divisors is an integer number (77500434).

Almost surely, 2^400002224 is an apocalyptic number.

It is an amenable number.

400002224 is a deficient number, since it is larger than the sum of its proper divisors (375002116).

400002224 is a wasteful number, since it uses less digits than its factorization.

400002224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25000147 (or 25000141 counting only the distinct ones).

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

The square root of 400002224 is about 20000.0555999227. The cubic root of 400002224 is about 736.8076652732.

Adding to 400002224 its reverse (422200004), we get a palindrome (822202228).

It can be divided in two parts, 40000 and 2224, that added together give a palindrome (42224).

The spelling of 400002224 in words is "four hundred million, two thousand, two hundred twenty-four".