258491520 has 256 divisors, whose sum is σ = 1046764800. Its totient is φ = 59056128.

The previous prime is 258491507. The next prime is 258491531. The reversal of 258491520 is 25194852.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119892 + ... + 122028.

It is an arithmetic number, because the mean of its divisors is an integer number (4088925).

Almost surely, 2^258491520 is an apocalyptic number.

258491520 is a gapful number since it is divisible by the number (20) 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 258491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (523382400).

258491520 is an abundant number, since it is smaller than the sum of its proper divisors (788273280).

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

258491520 is a wasteful number, since it uses less digits than its factorization.

258491520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172 (or 2154 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 258491520 is about 16077.6714731954. The cubic root of 258491520 is about 637.0136914039.

The spelling of 258491520 in words is "two hundred fifty-eight million, four hundred ninety-one thousand, five hundred twenty".