260805985 has 16 divisors (see below), whose sum is σ = 342456192. Its totient is φ = 189100800.

The previous prime is 260805953. The next prime is 260805997. The reversal of 260805985 is 589508062.

It is not a de Polignac number, because 260805985 - 2⁵ = 260805953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11500 + ... + 25570.

It is an arithmetic number, because the mean of its divisors is an integer number (21403512).

Almost surely, 2^260805985 is an apocalyptic number.

It is an amenable number.

260805985 is a deficient number, since it is larger than the sum of its proper divisors (81650207).

260805985 is a wasteful number, since it uses less digits than its factorization.

260805985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14424.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 260805985 is about 16149.4886915964. The cubic root of 260805985 is about 638.9092627431.

The spelling of 260805985 in words is "two hundred sixty million, eight hundred five thousand, nine hundred eighty-five".