400204004 has 12 divisors (see below), whose sum is σ = 741554604. Its totient is φ = 188331264.

The previous prime is 400204001. The next prime is 400204033. The reversal of 400204004 is 400402004.

It can be written as a sum of positive squares in 2 ways, for example, as 167702500 + 232501504 = 12950^2 + 15248^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 400204004.

It is not an unprimeable number, because it can be changed into a prime (400204001) 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, 2942609 + ... + 2942744.

It is an arithmetic number, because the mean of its divisors is an integer number (61796217).

Almost surely, 2^400204004 is an apocalyptic number.

It is an amenable number.

400204004 is a deficient number, since it is larger than the sum of its proper divisors (341350600).

400204004 is a wasteful number, since it uses less digits than its factorization.

400204004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885374 (or 5885372 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 400204004 is about 20005.0994498903. The cubic root of 400204004 is about 736.9315379665.

Adding to 400204004 its reverse (400402004), we get a palindrome (800606008).

The spelling of 400204004 in words is "four hundred million, two hundred four thousand, four".