505802785 has 8 divisors (see below), whose sum is σ = 642667176. Its totient is φ = 380839680.

The previous prime is 505802783. The next prime is 505802809. The reversal of 505802785 is 587208505.

It can be written as a sum of positive squares in 4 ways, for example, as 60466176 + 445336609 = 7776^2 + 21103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505802785 - 2¹ = 505802783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505802783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2975226 + ... + 2975395.

It is an arithmetic number, because the mean of its divisors is an integer number (80333397).

Almost surely, 2^505802785 is an apocalyptic number.

It is an amenable number.

505802785 is a deficient number, since it is larger than the sum of its proper divisors (136864391).

505802785 is a wasteful number, since it uses less digits than its factorization.

505802785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5950643.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 505802785 is about 22490.0596931178. The cubic root of 505802785 is about 796.7591728819.

The spelling of 505802785 in words is "five hundred five million, eight hundred two thousand, seven hundred eighty-five".