13440303 has 24 divisors (see below), whose sum is σ = 20837040. Its totient is φ = 8561520.

The previous prime is 13440293. The next prime is 13440307. The reversal of 13440303 is 30304431.

It is not a de Polignac number, because 13440303 - 2¹² = 13436207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13813 + ... + 14753.

It is an arithmetic number, because the mean of its divisors is an integer number (868210).

Almost surely, 2^13440303 is an apocalyptic number.

13440303 is a deficient number, since it is larger than the sum of its proper divisors (7396737).

13440303 is an equidigital number, since it uses as much as digits as its factorization.

13440303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996 (or 967 counting only the distinct ones).

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

The square root of 13440303 is about 3666.1018807447. The cubic root of 13440303 is about 237.7586648117.

Adding to 13440303 its reverse (30304431), we get a palindrome (43744734).

The spelling of 13440303 in words is "thirteen million, four hundred forty thousand, three hundred three".