400000331403 has 64 divisors (see below), whose sum is σ = 641793853440. Its totient is φ = 245260224000.

The previous prime is 400000331387. The next prime is 400000331413. The reversal of 400000331403 is 304133000004.

It is not a de Polignac number, because 400000331403 - 2⁴ = 400000331387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400000331413) 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 63 ways as a sum of consecutive naturals, for example, 14245728 + ... + 14273778.

It is an arithmetic number, because the mean of its divisors is an integer number (10028028960).

Almost surely, 2^400000331403 is an apocalyptic number.

400000331403 is a deficient number, since it is larger than the sum of its proper divisors (241793522037).

400000331403 is a wasteful number, since it uses less digits than its factorization.

400000331403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28785 (or 28779 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 400000331403 its reverse (304133000004), we get a palindrome (704133331407).

The spelling of 400000331403 in words is "four hundred billion, three hundred thirty-one thousand, four hundred three".