260939688 has 64 divisors (see below), whose sum is σ = 672490560. Its totient is φ = 84312576.

The previous prime is 260939641. The next prime is 260939689. The reversal of 260939688 is 886939062.

It is a self number, because there is not a number n which added to its sum of digits gives 260939688.

It is not an unprimeable number, because it can be changed into a prime (260939689) 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 15 ways as a sum of consecutive naturals, for example, 405495 + ... + 406137.

It is an arithmetic number, because the mean of its divisors is an integer number (10507665).

Almost surely, 2^260939688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 260939688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336245280).

260939688 is an abundant number, since it is smaller than the sum of its proper divisors (411550872).

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

260939688 is a wasteful number, since it uses less digits than its factorization.

260939688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146 (or 1142 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 260939688 is about 16153.6277040174. The cubic root of 260939688 is about 639.0184236988.

The spelling of 260939688 in words is "two hundred sixty million, nine hundred thirty-nine thousand, six hundred eighty-eight".