395040403 has 4 divisors (see below), whose sum is σ = 395297968. Its totient is φ = 394782840.

The previous prime is 395040383. The next prime is 395040413. The reversal of 395040403 is 304040593.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395040403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395040413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126468 + ... + 129553.

It is an arithmetic number, because the mean of its divisors is an integer number (98824492).

Almost surely, 2^395040403 is an apocalyptic number.

395040403 is a deficient number, since it is larger than the sum of its proper divisors (257565).

395040403 is a wasteful number, since it uses less digits than its factorization.

395040403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257564.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 395040403 is about 19875.6233361372. The cubic root of 395040403 is about 733.7484078336.

Adding to 395040403 its reverse (304040593), we get a palindrome (699080996).

The spelling of 395040403 in words is "three hundred ninety-five million, forty thousand, four hundred three".