260647686 has 56 divisors (see below), whose sum is σ = 627485160. Its totient is φ = 80199288.

The previous prime is 260647669. The next prime is 260647697. The reversal of 260647686 is 686746062.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 20049816 + ... + 20049828.

Almost surely, 2^260647686 is an apocalyptic number.

260647686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 260647686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313742580).

260647686 is an abundant number, since it is smaller than the sum of its proper divisors (366837474).

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

260647686 is an frugal number, since it uses more digits than its factorization.

260647686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 260647686 is about 16144.5868946839. The cubic root of 260647686 is about 638.7799722967.

The spelling of 260647686 in words is "two hundred sixty million, six hundred forty-seven thousand, six hundred eighty-six".