400423440412 has 24 divisors (see below), whose sum is σ = 706900745600. Its totient is φ = 198458282736.

The previous prime is 400423440401. The next prime is 400423440413. The reversal of 400423440412 is 214044324004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400423440413) 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, 563112 + ... + 1057327.

Almost surely, 2^400423440412 is an apocalyptic number.

It is an amenable number.

400423440412 is a deficient number, since it is larger than the sum of its proper divisors (306477305188).

400423440412 is a wasteful number, since it uses less digits than its factorization.

400423440412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620985 (or 1620983 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 400423440412 its reverse (214044324004), we get a palindrome (614467764416).

The spelling of 400423440412 in words is "four hundred billion, four hundred twenty-three million, four hundred forty thousand, four hundred twelve".