258786 has 24 divisors (see below), whose sum is σ = 612144. Its totient is φ = 78360.

The previous prime is 258779. The next prime is 258787. The reversal of 258786 is 687852.

258786 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2¹⁷ + 5⁷ + 7⁵ + 8 + 8⁵ + 6 .

It is a self number, because there is not a number n which added to its sum of digits gives 258786.

It is not an unprimeable number, because it can be changed into a prime (258787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 456 + ... + 851.

It is an arithmetic number, because the mean of its divisors is an integer number (25506).

2²⁵⁸⁷⁸⁶ is an apocalyptic number.

258786 is an abundant number, since it is smaller than the sum of its proper divisors (353358).

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

258786 is a wasteful number, since it uses less digits than its factorization.

258786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326 (or 1323 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 258786 is about 508.7101335731. The cubic root of 258786 is about 63.7255500242.

The spelling of 258786 in words is "two hundred fifty-eight thousand, seven hundred eighty-six".