258291887 has 12 divisors (see below), whose sum is σ = 302132376. Its totient is φ = 220162320.

The previous prime is 258291883. The next prime is 258291899. The reversal of 258291887 is 788192852.

It is a happy number.

It is not a de Polignac number, because 258291887 - 2² = 258291883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258291883) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 5693 + ... + 23430.

It is an arithmetic number, because the mean of its divisors is an integer number (25177698).

Almost surely, 2^258291887 is an apocalyptic number.

258291887 is a deficient number, since it is larger than the sum of its proper divisors (43840489).

258291887 is a wasteful number, since it uses less digits than its factorization.

258291887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29318 (or 29311 counting only the distinct ones).

The product of its digits is 645120, while the sum is 50.

The square root of 258291887 is about 16071.4618812353. The cubic root of 258291887 is about 636.8496606124.

The spelling of 258291887 in words is "two hundred fifty-eight million, two hundred ninety-one thousand, eight hundred eighty-seven".