285261193 has 24 divisors (see below), whose sum is σ = 355096320. Its totient is φ = 227797920.

The previous prime is 285261181. The next prime is 285261233. The reversal of 285261193 is 391162582.

It is not a de Polignac number, because 285261193 - 2⁵ = 285261161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285261793) 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 23 ways as a sum of consecutive naturals, for example, 54280 + ... + 59302.

It is an arithmetic number, because the mean of its divisors is an integer number (14795680).

Almost surely, 2^285261193 is an apocalyptic number.

It is an amenable number.

285261193 is a deficient number, since it is larger than the sum of its proper divisors (69835127).

285261193 is a wasteful number, since it uses less digits than its factorization.

285261193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117 (or 5110 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 285261193 is about 16889.6771135508. The cubic root of 285261193 is about 658.2854126240.

The spelling of 285261193 in words is "two hundred eighty-five million, two hundred sixty-one thousand, one hundred ninety-three".