400504004 has 24 divisors (see below), whose sum is σ = 724416000. Its totient is φ = 193544640.

The previous prime is 400504001. The next prime is 400504033. The reversal of 400504004 is 400405004.

It is not an unprimeable number, because it can be changed into a prime (400504001) 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, 128537 + ... + 131615.

It is an arithmetic number, because the mean of its divisors is an integer number (30184000).

Almost surely, 2^400504004 is an apocalyptic number.

It is an amenable number.

400504004 is a deficient number, since it is larger than the sum of its proper divisors (323911996).

400504004 is a wasteful number, since it uses less digits than its factorization.

400504004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163 (or 4161 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 400504004 is about 20012.5961334356. The cubic root of 400504004 is about 737.1156309462.

Adding to 400504004 its reverse (400405004), we get a palindrome (800909008).

The spelling of 400504004 in words is "four hundred million, five hundred four thousand, four".