285769345 has 4 divisors (see below), whose sum is σ = 342923220. Its totient is φ = 228615472.

The previous prime is 285769343. The next prime is 285769361. The reversal of 285769345 is 543967582.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46881409 + 238887936 = 6847^2 + 15456^2 .

It is a cyclic number.

It is not a de Polignac number, because 285769345 - 2¹ = 285769343 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (285769343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28576930 + ... + 28576939.

It is an arithmetic number, because the mean of its divisors is an integer number (85730805).

Almost surely, 2^285769345 is an apocalyptic number.

It is an amenable number.

285769345 is a deficient number, since it is larger than the sum of its proper divisors (57153875).

285769345 is an equidigital number, since it uses as much as digits as its factorization.

285769345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57153874.

The product of its digits is 1814400, while the sum is 49.

The square root of 285769345 is about 16904.7136917488. The cubic root of 285769345 is about 658.6760611791.

The spelling of 285769345 in words is "two hundred eighty-five million, seven hundred sixty-nine thousand, three hundred forty-five".