505788403 has 12 divisors (see below), whose sum is σ = 548318808. Its totient is φ = 464936640.

The previous prime is 505788389. The next prime is 505788421. The reversal of 505788403 is 304887505.

It is a de Polignac number, because none of the positive numbers 2^k-505788403 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 (505788433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23388 + ... + 39478.

It is an arithmetic number, because the mean of its divisors is an integer number (45693234).

Almost surely, 2^505788403 is an apocalyptic number.

505788403 is a deficient number, since it is larger than the sum of its proper divisors (42530405).

505788403 is a wasteful number, since it uses less digits than its factorization.

505788403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16194 (or 16151 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 505788403 is about 22489.7399495859. The cubic root of 505788403 is about 796.7516211250.

The spelling of 505788403 in words is "five hundred five million, seven hundred eighty-eight thousand, four hundred three".