285840103 has 4 divisors (see below), whose sum is σ = 285916960. Its totient is φ = 285763248.

The previous prime is 285840089. The next prime is 285840109. The reversal of 285840103 is 301048582.

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-285840103 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 (285840109) 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, 32550 + ... + 40387.

It is an arithmetic number, because the mean of its divisors is an integer number (71479240).

Almost surely, 2^285840103 is an apocalyptic number.

285840103 is a deficient number, since it is larger than the sum of its proper divisors (76857).

285840103 is an equidigital number, since it uses as much as digits as its factorization.

285840103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76856.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 285840103 is about 16906.8064104372. The cubic root of 285840103 is about 658.7304205840.

Adding to 285840103 its reverse (301048582), we get a palindrome (586888685).

The spelling of 285840103 in words is "two hundred eighty-five million, eight hundred forty thousand, one hundred three".