261262688 has 24 divisors (see below), whose sum is σ = 515189808. Its totient is φ = 130420864.

The previous prime is 261262663. The next prime is 261262691. The reversal of 261262688 is 886262162.

261262688 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 14645 + ... + 27147.

It is an arithmetic number, because the mean of its divisors is an integer number (21466242).

Almost surely, 2^261262688 is an apocalyptic number.

It is an amenable number.

261262688 is a deficient number, since it is larger than the sum of its proper divisors (253927120).

261262688 is a wasteful number, since it uses less digits than its factorization.

261262688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13166 (or 13158 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 261262688 is about 16163.6223662891. The cubic root of 261262688 is about 639.2819812112.

The spelling of 261262688 in words is "two hundred sixty-one million, two hundred sixty-two thousand, six hundred eighty-eight".