260685578 has 8 divisors (see below), whose sum is σ = 391400100. Its totient is φ = 130218880.

The previous prime is 260685577. The next prime is 260685587. The reversal of 260685578 is 875586062.

It can be written as a sum of positive squares in 2 ways, for example, as 259951129 + 734449 = 16123^2 + 857^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (260685571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59303 + ... + 63546.

Almost surely, 2^260685578 is an apocalyptic number.

260685578 is a deficient number, since it is larger than the sum of its proper divisors (130714522).

260685578 is a wasteful number, since it uses less digits than its factorization.

260685578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123912.

The product of its (nonzero) digits is 806400, while the sum is 47.

The square root of 260685578 is about 16145.7603723083. The cubic root of 260685578 is about 638.8109252895.

The spelling of 260685578 in words is "two hundred sixty million, six hundred eighty-five thousand, five hundred seventy-eight".