400222344 has 32 divisors (see below), whose sum is σ = 1007280000. Its totient is φ = 132510912.

The previous prime is 400222331. The next prime is 400222349. The reversal of 400222344 is 443222004.

It is a self number, because there is not a number n which added to its sum of digits gives 400222344.

It is not an unprimeable number, because it can be changed into a prime (400222349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52384 + ... + 59535.

It is an arithmetic number, because the mean of its divisors is an integer number (31477500).

Almost surely, 2^400222344 is an apocalyptic number.

It is an amenable number.

400222344 is an abundant number, since it is smaller than the sum of its proper divisors (607057656).

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

400222344 is a wasteful number, since it uses less digits than its factorization.

400222344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112077 (or 112073 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 400222344 is about 20005.5578277638. The cubic root of 400222344 is about 736.9427948237.

Adding to 400222344 its reverse (443222004), we get a palindrome (843444348).

The spelling of 400222344 in words is "four hundred million, two hundred twenty-two thousand, three hundred forty-four".