285260091 has 16 divisors (see below), whose sum is σ = 400780800. Its totient is φ = 179977248.

The previous prime is 285260081. The next prime is 285260111. The reversal of 285260091 is 190062582.

It is not a de Polignac number, because 285260091 - 2⁷ = 285259963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285260011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70830 + ... + 74748.

It is an arithmetic number, because the mean of its divisors is an integer number (25048800).

Almost surely, 2^285260091 is an apocalyptic number.

285260091 is a deficient number, since it is larger than the sum of its proper divisors (115520709).

285260091 is a wasteful number, since it uses less digits than its factorization.

285260091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 285260091 is about 16889.6444900418. The cubic root of 285260091 is about 658.2845649430.

The spelling of 285260091 in words is "two hundred eighty-five million, two hundred sixty thousand, ninety-one".