400440103 has 12 divisors (see below), whose sum is σ = 471057120. Its totient is φ = 339374112.

The previous prime is 400440077. The next prime is 400440107. The reversal of 400440103 is 301044004.

It is a de Polignac number, because none of the positive numbers 2^k-400440103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400440107) 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 11 ways as a sum of consecutive naturals, for example, 41551 + ... + 50272.

It is an arithmetic number, because the mean of its divisors is an integer number (39254760).

Almost surely, 2^400440103 is an apocalyptic number.

400440103 is a deficient number, since it is larger than the sum of its proper divisors (70617017).

400440103 is an equidigital number, since it uses as much as digits as its factorization.

400440103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91926 (or 91919 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400440103 is about 20010.9995502474. Note that the first 3 decimals coincide. The cubic root of 400440103 is about 737.0764262352.

Adding to 400440103 its reverse (301044004), we get a palindrome (701484107).

The spelling of 400440103 in words is "four hundred million, four hundred forty thousand, one hundred three".