258881868 has 108 divisors (see below), whose sum is σ = 773507280. Its totient is φ = 71513280.

The previous prime is 258881851. The next prime is 258881879. The reversal of 258881868 is 868188852.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 241638 + ... + 242706.

Almost surely, 2^258881868 is an apocalyptic number.

258881868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258881868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386753640).

258881868 is an abundant number, since it is smaller than the sum of its proper divisors (514625412).

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

258881868 is a wasteful number, since it uses less digits than its factorization.

258881868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148 (or 1112 counting only the distinct ones).

The product of its digits is 1966080, while the sum is 54.

The square root of 258881868 is about 16089.8063381757. The cubic root of 258881868 is about 637.3341815560.

The spelling of 258881868 in words is "two hundred fifty-eight million, eight hundred eighty-one thousand, eight hundred sixty-eight".