285197860 has 24 divisors (see below), whose sum is σ = 607122936. Its totient is φ = 112515840.

The previous prime is 285197849. The next prime is 285197903. The reversal of 285197860 is 68791582.

It can be written as a sum of positive squares in 4 ways, for example, as 1679616 + 283518244 = 1296^2 + 16838^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 285197860.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96211 + ... + 99130.

It is an arithmetic number, because the mean of its divisors is an integer number (25296789).

Almost surely, 2^285197860 is an apocalyptic number.

285197860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285197860 is an abundant number, since it is smaller than the sum of its proper divisors (321925076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285197860 is a wasteful number, since it uses less digits than its factorization.

285197860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195423 (or 195421 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 285197860 is about 16887.8021068462. The cubic root of 285197860 is about 658.2366920399.

The spelling of 285197860 in words is "two hundred eighty-five million, one hundred ninety-seven thousand, eight hundred sixty".