260828865 has 48 divisors (see below), whose sum is σ = 519180480. Its totient is φ = 119802240.

The previous prime is 260828861. The next prime is 260828891. The reversal of 260828865 is 568828062.

It is not a de Polignac number, because 260828865 - 2² = 260828861 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 260828865.

It is not an unprimeable number, because it can be changed into a prime (260828861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4462 + ... + 23271.

It is an arithmetic number, because the mean of its divisors is an integer number (10816260).

Almost surely, 2^260828865 is an apocalyptic number.

It is an amenable number.

260828865 is a deficient number, since it is larger than the sum of its proper divisors (258351615).

260828865 is a wasteful number, since it uses less digits than its factorization.

260828865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27774 (or 27771 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 260828865 is about 16150.1970576213. The cubic root of 260828865 is about 638.9279456176.

The spelling of 260828865 in words is "two hundred sixty million, eight hundred twenty-eight thousand, eight hundred sixty-five".