285135273 has 24 divisors (see below), whose sum is σ = 418072200. Its totient is φ = 187246080.

The previous prime is 285135269. The next prime is 285135307. The reversal of 285135273 is 372531582.

It is a happy number.

285135273 is a `hidden beast` number, since 28 + 513 + 52 + 73 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 34609689 + 250525584 = 5883^2 + 15828^2 .

It is not a de Polignac number, because 285135273 - 2² = 285135269 is a prime.

It is a super-3 number, since 3×285135273³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (285135173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183303 + ... + 184851.

It is an arithmetic number, because the mean of its divisors is an integer number (17419675).

Almost surely, 2^285135273 is an apocalyptic number.

It is an amenable number.

285135273 is a deficient number, since it is larger than the sum of its proper divisors (132936927).

285135273 is a wasteful number, since it uses less digits than its factorization.

285135273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849 (or 1846 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 285135273 is about 16885.9489813276. The cubic root of 285135273 is about 658.1885382497.

The spelling of 285135273 in words is "two hundred eighty-five million, one hundred thirty-five thousand, two hundred seventy-three".