285196689 has 12 divisors (see below), whose sum is σ = 418100176. Its totient is φ = 187292952.

The previous prime is 285196687. The next prime is 285196693. The reversal of 285196689 is 986691582.

It is a happy number.

It is not a de Polignac number, because 285196689 - 2¹ = 285196687 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (285196687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235879 + ... + 237084.

Almost surely, 2^285196689 is an apocalyptic number.

It is an amenable number.

285196689 is a deficient number, since it is larger than the sum of its proper divisors (132903487).

285196689 is a wasteful number, since it uses less digits than its factorization.

285196689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473036 (or 473033 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 285196689 is about 16887.7674368165. The cubic root of 285196689 is about 658.2357911493.

The spelling of 285196689 in words is "two hundred eighty-five million, one hundred ninety-six thousand, six hundred eighty-nine".