400005203 has 16 divisors (see below), whose sum is σ = 445562880. Its totient is φ = 356762016.

The previous prime is 400005173. The next prime is 400005211. The reversal of 400005203 is 302500004.

It is not a de Polignac number, because 400005203 - 2⁶ = 400005139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400005283) 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 15 ways as a sum of consecutive naturals, for example, 44126 + ... + 52412.

It is an arithmetic number, because the mean of its divisors is an integer number (27847680).

Almost surely, 2^400005203 is an apocalyptic number.

400005203 is a deficient number, since it is larger than the sum of its proper divisors (45557677).

400005203 is a wasteful number, since it uses less digits than its factorization.

400005203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8426.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 400005203 is about 20000.1300745770. The cubic root of 400005203 is about 736.8094943835.

Adding to 400005203 its reverse (302500004), we get a palindrome (702505207).

The spelling of 400005203 in words is "four hundred million, five thousand, two hundred three".