260779985 has 8 divisors (see below), whose sum is σ = 315188160. Its totient is φ = 207122544.

The previous prime is 260779979. The next prime is 260780011. The reversal of 260779985 is 589977062.

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

It is a cyclic number.

It is not a de Polignac number, because 260779985 - 2¹⁸ = 260517841 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186917 + ... + 188306.

It is an arithmetic number, because the mean of its divisors is an integer number (39398520).

Almost surely, 2^260779985 is an apocalyptic number.

It is an amenable number.

260779985 is a deficient number, since it is larger than the sum of its proper divisors (54408175).

260779985 is a wasteful number, since it uses less digits than its factorization.

260779985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375367.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 260779985 is about 16148.6836924871. The cubic root of 260779985 is about 638.8880308775. Note that the first 3 decimals are identical.

The spelling of 260779985 in words is "two hundred sixty million, seven hundred seventy-nine thousand, nine hundred eighty-five".