402440303 has 6 divisors (see below), whose sum is σ = 427506096. Its totient is φ = 378767072.

The previous prime is 402440237. The next prime is 402440321. The reversal of 402440303 is 303044204.

It is a happy number.

It is not a de Polignac number, because 402440303 - 2²⁶ = 335331439 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 (402440323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 695975 + ... + 696552.

It is an arithmetic number, because the mean of its divisors is an integer number (71251016).

Almost surely, 2^402440303 is an apocalyptic number.

402440303 is a deficient number, since it is larger than the sum of its proper divisors (25065793).

402440303 is a wasteful number, since it uses less digits than its factorization.

402440303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392561 (or 1392544 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 402440303 is about 20060.9148096491. The cubic root of 402440303 is about 738.3016218253.

Adding to 402440303 its reverse (303044204), we get a palindrome (705484507).

The spelling of 402440303 in words is "four hundred two million, four hundred forty thousand, three hundred three".