285795881 has 12 divisors (see below), whose sum is σ = 341443908. Its totient is φ = 238345632.

The previous prime is 285795877. The next prime is 285795889. The reversal of 285795881 is 188597582.

It can be written as a sum of positive squares in 2 ways, for example, as 262602025 + 23193856 = 16205^2 + 4816^2 .

It is not a de Polignac number, because 285795881 - 2² = 285795877 is a prime.

It is a super-2 number, since 2×285795881² = 163358571193132322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285795889) 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 11 ways as a sum of consecutive naturals, for example, 77006 + ... + 80631.

It is an arithmetic number, because the mean of its divisors is an integer number (28453659).

Almost surely, 2^285795881 is an apocalyptic number.

It is an amenable number.

285795881 is a deficient number, since it is larger than the sum of its proper divisors (55648027).

285795881 is a wasteful number, since it uses less digits than its factorization.

285795881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157688 (or 157681 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 53.

The square root of 285795881 is about 16905.4985433734. The cubic root of 285795881 is about 658.6964483518.

The spelling of 285795881 in words is "two hundred eighty-five million, seven hundred ninety-five thousand, eight hundred eighty-one".