260278656 has 128 divisors (see below), whose sum is σ = 772295040. Its totient is φ = 76984320.

The previous prime is 260278651. The next prime is 260278661. The reversal of 260278656 is 656872062.

It is an interprime number because it is at equal distance from previous prime (260278651) and next prime (260278661).

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260278651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180916 + ... + 182348.

It is an arithmetic number, because the mean of its divisors is an integer number (6033555).

Almost surely, 2^260278656 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 260278656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386147520).

260278656 is an abundant number, since it is smaller than the sum of its proper divisors (512016384).

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

260278656 is a wasteful number, since it uses less digits than its factorization.

260278656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 260278656 is about 16133.1539383965. The cubic root of 260278656 is about 638.4783642599.

The spelling of 260278656 in words is "two hundred sixty million, two hundred seventy-eight thousand, six hundred fifty-six".