40303 has 4 divisors (see below), whose sum is σ = 41328. Its totient is φ = 39280.

The previous prime is 40289. The next prime is 40343. The reversal of 40303 is 30304.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40303 - 2⁹ = 39791 is a prime.

40303 is a modest number, since divided by 303 gives 4 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 40303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451 + ... + 532.

It is an arithmetic number, because the mean of its divisors is an integer number (10332).

2⁴⁰³⁰³ is an apocalyptic number.

40303 is a deficient number, since it is larger than the sum of its proper divisors (1025).

40303 is an equidigital number, since it uses as much as digits as its factorization.

40303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 36, while the sum is 10.

The square root of 40303 is about 200.7560708920. The cubic root of 40303 is about 34.2856555885.

Adding to 40303 its reverse (30304), we get a palindrome (70607).

Subtracting from 40303 its reverse (30304), we obtain a palindrome (9999).

It can be divided in two parts, 4030 and 3, that multiplied together give a triangular number (12090 = T₁₅₅).

The spelling of 40303 in words is "forty thousand, three hundred three", and thus it is an iban number.