258195798 has 72 divisors (see below), whose sum is σ = 661564800. Its totient is φ = 72545760.

The previous prime is 258195797. The next prime is 258195799. The reversal of 258195798 is 897591852.

258195798 is a `hidden beast` number, since 2 + 58 + 19 + 579 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (258195797) and next prime (258195799).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258195793) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51403 + ... + 56201.

It is an arithmetic number, because the mean of its divisors is an integer number (9188400).

Almost surely, 2^258195798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 258195798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330782400).

258195798 is an abundant number, since it is smaller than the sum of its proper divisors (403369002).

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

258195798 is a wasteful number, since it uses less digits than its factorization.

258195798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4882 (or 4872 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 54.

The square root of 258195798 is about 16068.4721737942. The cubic root of 258195798 is about 636.7706778283.

The spelling of 258195798 in words is "two hundred fifty-eight million, one hundred ninety-five thousand, seven hundred ninety-eight".