400420242004 has 24 divisors (see below), whose sum is σ = 708037796648. Its totient is φ = 198124185600.

The previous prime is 400420241983. The next prime is 400420242007. The reversal of 400420242004 is 400242024004.

It can be written as a sum of positive squares in 4 ways, for example, as 202813321104 + 197606920900 = 450348^2 + 444530^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400420242007) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3789472 + ... + 3893704.

Almost surely, 2^400420242004 is an apocalyptic number.

It is an amenable number.

400420242004 is a deficient number, since it is larger than the sum of its proper divisors (307617554644).

400420242004 is a wasteful number, since it uses less digits than its factorization.

400420242004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114235 (or 114233 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 400420242004 its reverse (400242024004), we get a palindrome (800662266008).

The spelling of 400420242004 in words is "four hundred billion, four hundred twenty million, two hundred forty-two thousand, four".