400223244 has 12 divisors (see below), whose sum is σ = 933854264. Its totient is φ = 133407744.

The previous prime is 400223183. The next prime is 400223249. The reversal of 400223244 is 442322004.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 400223244.

It is not an unprimeable number, because it can be changed into a prime (400223249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16675957 + ... + 16675980.

Almost surely, 2^400223244 is an apocalyptic number.

It is an amenable number.

400223244 is an abundant number, since it is smaller than the sum of its proper divisors (533631020).

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

400223244 is a wasteful number, since it uses less digits than its factorization.

400223244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33351944 (or 33351942 counting only the distinct ones).

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

The square root of 400223244 is about 20005.5803215003. The cubic root of 400223244 is about 736.9433472234.

Adding to 400223244 its reverse (442322004), we get a palindrome (842545248).

The spelling of 400223244 in words is "four hundred million, two hundred twenty-three thousand, two hundred forty-four".