258491904 has 80 divisors (see below), whose sum is σ = 751291200. Its totient is φ = 78325760.

The previous prime is 258491873. The next prime is 258491911. The reversal of 258491904 is 409194852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9247 + ... + 24545.

It is an arithmetic number, because the mean of its divisors is an integer number (9391140).

Almost surely, 2^258491904 is an apocalyptic number.

258491904 is a gapful number since it is divisible by the number (24) 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 258491904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375645600).

258491904 is an abundant number, since it is smaller than the sum of its proper divisors (492799296).

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

258491904 is a wasteful number, since it uses less digits than its factorization.

258491904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15331 (or 15315 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 258491904 is about 16077.6834152187. The cubic root of 258491904 is about 637.0140068406.

The spelling of 258491904 in words is "two hundred fifty-eight million, four hundred ninety-one thousand, nine hundred four".