285440803 has 4 divisors (see below), whose sum is σ = 289461168. Its totient is φ = 281420440.

The previous prime is 285440783. The next prime is 285440849. The reversal of 285440803 is 308044582.

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

It is a cyclic number.

It is not a de Polignac number, because 285440803 - 2²¹ = 283343651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285440203) 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 3 ways as a sum of consecutive naturals, for example, 2010076 + ... + 2010217.

It is an arithmetic number, because the mean of its divisors is an integer number (72365292).

Almost surely, 2^285440803 is an apocalyptic number.

285440803 is a deficient number, since it is larger than the sum of its proper divisors (4020365).

285440803 is an equidigital number, since it uses as much as digits as its factorization.

285440803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020364.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 285440803 is about 16894.9934300076. The cubic root of 285440803 is about 658.4235431510.

The spelling of 285440803 in words is "two hundred eighty-five million, four hundred forty thousand, eight hundred three".