400240303 has 2 divisors, whose sum is σ = 400240304. Its totient is φ = 400240302.

The previous prime is 400240289. The next prime is 400240327. The reversal of 400240303 is 303042004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400240303 - 2¹³ = 400232111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400240003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200120151 + 200120152.

It is an arithmetic number, because the mean of its divisors is an integer number (200120152).

Almost surely, 2^400240303 is an apocalyptic number.

400240303 is a deficient number, since it is larger than the sum of its proper divisors (1).

400240303 is an equidigital number, since it uses as much as digits as its factorization.

400240303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 400240303 is about 20006.0066729970. The cubic root of 400240303 is about 736.9538174948.

Adding to 400240303 its reverse (303042004), we get a palindrome (703282307).

The spelling of 400240303 in words is "four hundred million, two hundred forty thousand, three hundred three".