258278916 has 48 divisors (see below), whose sum is σ = 692249600. Its totient is φ = 73418400.

The previous prime is 258278899. The next prime is 258278927. The reversal of 258278916 is 619872852.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8991 + ... + 24441.

Almost surely, 2^258278916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258278916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (346124800).

258278916 is an abundant number, since it is smaller than the sum of its proper divisors (433970684).

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

258278916 is a wasteful number, since it uses less digits than its factorization.

258278916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15664 (or 15662 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 258278916 is about 16071.0583347831. The cubic root of 258278916 is about 636.8389999146.

It can be divided in two parts, 25827 and 8916, that added together give a palindrome (34743).

The spelling of 258278916 in words is "two hundred fifty-eight million, two hundred seventy-eight thousand, nine hundred sixteen".