258087765 has 32 divisors (see below), whose sum is σ = 456736896. Its totient is φ = 123621120.

The previous prime is 258087721. The next prime is 258087779. The reversal of 258087765 is 567780852.

It is not a de Polignac number, because 258087765 - 2⁸ = 258087509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10671 + ... + 25100.

It is an arithmetic number, because the mean of its divisors is an integer number (14273028).

Almost surely, 2^258087765 is an apocalyptic number.

It is an amenable number.

258087765 is a deficient number, since it is larger than the sum of its proper divisors (198649131).

258087765 is a wasteful number, since it uses less digits than its factorization.

258087765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35829.

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 258087765 is about 16065.1101770265. The cubic root of 258087765 is about 636.6818539668.

It can be divided in two parts, 258087 and 765, that added together give a palindrome (258852).

The spelling of 258087765 in words is "two hundred fifty-eight million, eighty-seven thousand, seven hundred sixty-five".