260818656 has 96 divisors (see below), whose sum is σ = 786901248. Its totient is φ = 74096640.

The previous prime is 260818637. The next prime is 260818667. The reversal of 260818656 is 656818062.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent 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, 128691 + ... + 130701.

It is an arithmetic number, because the mean of its divisors is an integer number (8196888).

Almost surely, 2^260818656 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 260818656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393450624).

260818656 is an abundant number, since it is smaller than the sum of its proper divisors (526082592).

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

260818656 is a wasteful number, since it uses less digits than its factorization.

260818656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224 (or 2216 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 260818656 is about 16149.8809902736. The cubic root of 260818656 is about 638.9196094998.

The spelling of 260818656 in words is "two hundred sixty million, eight hundred eighteen thousand, six hundred fifty-six".