260915864 has 64 divisors (see below), whose sum is σ = 589731840. Its totient is φ = 106754560.

The previous prime is 260915857. The next prime is 260915867. The reversal of 260915864 is 468519062.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260915867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30617 + ... + 38199.

It is an arithmetic number, because the mean of its divisors is an integer number (9214560).

Almost surely, 2^260915864 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 260915864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294865920).

260915864 is an abundant number, since it is smaller than the sum of its proper divisors (328815976).

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

260915864 is a wasteful number, since it uses less digits than its factorization.

260915864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7640 (or 7636 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 260915864 is about 16152.8902676889. The cubic root of 260915864 is about 638.9989754776.

The spelling of 260915864 in words is "two hundred sixty million, nine hundred fifteen thousand, eight hundred sixty-four".