258991928 has 16 divisors (see below), whose sum is σ = 522964680. Its totient is φ = 119534688.

The previous prime is 258991913. The next prime is 258991939. The reversal of 258991928 is 829199852.

It is a self number, because there is not a number n which added to its sum of digits gives 258991928.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245050 + ... + 1245257.

Almost surely, 2^258991928 is an apocalyptic number.

It is an amenable number.

258991928 is an abundant number, since it is smaller than the sum of its proper divisors (263972752).

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

258991928 is a wasteful number, since it uses less digits than its factorization.

258991928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490326 (or 2490322 counting only the distinct ones).

The product of its digits is 933120, while the sum is 53.

The square root of 258991928 is about 16093.2261526395. The cubic root of 258991928 is about 637.4244866599.

The spelling of 258991928 in words is "two hundred fifty-eight million, nine hundred ninety-one thousand, nine hundred twenty-eight".