400431003 has 16 divisors (see below), whose sum is σ = 612852480. Its totient is φ = 227815776.

The previous prime is 400430941. The next prime is 400431049. The reversal of 400431003 is 300134004.

It is not a de Polignac number, because 400431003 - 2⁶ = 400430939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400430003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36825 + ... + 46442.

It is an arithmetic number, because the mean of its divisors is an integer number (38303280).

Almost surely, 2^400431003 is an apocalyptic number.

400431003 is a deficient number, since it is larger than the sum of its proper divisors (212421477).

400431003 is a wasteful number, since it uses less digits than its factorization.

400431003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83506.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 400431003 is about 20010.7721740067. The cubic root of 400431003 is about 737.0708428398.

Adding to 400431003 its reverse (300134004), we get a palindrome (700565007).

The spelling of 400431003 in words is "four hundred million, four hundred thirty-one thousand, three".