400004223 has 8 divisors (see below), whose sum is σ = 533665200. Its totient is φ = 266506368.

The previous prime is 400004219. The next prime is 400004239. The reversal of 400004223 is 322400004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400004223 - 2² = 400004219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400004123) 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, 34938 + ... + 44951.

It is an arithmetic number, because the mean of its divisors is an integer number (66708150).

Almost surely, 2^400004223 is an apocalyptic number.

400004223 is a deficient number, since it is larger than the sum of its proper divisors (133660977).

400004223 is a wasteful number, since it uses less digits than its factorization.

400004223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81561.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 400004223 is about 20000.1055747213. The cubic root of 400004223 is about 736.8088926631.

Adding to 400004223 its reverse (322400004), we get a palindrome (722404227).

The spelling of 400004223 in words is "four hundred million, four thousand, two hundred twenty-three".