400222424 has 16 divisors (see below), whose sum is σ = 857619600. Its totient is φ = 171523872.

The previous prime is 400222411. The next prime is 400222463. The reversal of 400222424 is 424222004.

It is a junction number, because it is equal to n+sod(n) for n = 400222396 and 400222405.

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, 3573359 + ... + 3573470.

It is an arithmetic number, because the mean of its divisors is an integer number (53601225).

Almost surely, 2^400222424 is an apocalyptic number.

It is an amenable number.

400222424 is an abundant number, since it is smaller than the sum of its proper divisors (457397176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400222424 is a wasteful number, since it uses less digits than its factorization.

400222424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7146842 (or 7146838 counting only the distinct ones).

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

The square root of 400222424 is about 20005.5598272080. The cubic root of 400222424 is about 736.9428439260.

Adding to 400222424 its reverse (424222004), we get a palindrome (824444428).

The spelling of 400222424 in words is "four hundred million, two hundred twenty-two thousand, four hundred twenty-four".