260636560 has 40 divisors (see below), whose sum is σ = 611998776. Its totient is φ = 103219200.

The previous prime is 260636533. The next prime is 260636567. The reversal of 260636560 is 65636062.

It can be written as a sum of positive squares in 4 ways, for example, as 57517056 + 203119504 = 7584^2 + 14252^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (260636567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8049 + ... + 24208.

Almost surely, 2^260636560 is an apocalyptic number.

260636560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260636560 is an abundant number, since it is smaller than the sum of its proper divisors (351362216).

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

260636560 is a wasteful number, since it uses less digits than its factorization.

260636560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32371 (or 32365 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 260636560 is about 16144.2423173093. The cubic root of 260636560 is about 638.7708831859.

It can be divided in two parts, 26063 and 6560, that added together give a palindrome (32623).

The spelling of 260636560 in words is "two hundred sixty million, six hundred thirty-six thousand, five hundred sixty".