258398805 has 24 divisors (see below), whose sum is σ = 480939552. Its totient is φ = 118124832.

The previous prime is 258398801. The next prime is 258398821. The reversal of 258398805 is 508893852.

It is not a de Polignac number, because 258398805 - 2² = 258398801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258398801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175047 + ... + 176516.

It is an arithmetic number, because the mean of its divisors is an integer number (20039148).

Almost surely, 2^258398805 is an apocalyptic number.

It is an amenable number.

258398805 is a deficient number, since it is larger than the sum of its proper divisors (222540747).

258398805 is a wasteful number, since it uses less digits than its factorization.

258398805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351585 (or 351578 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The square root of 258398805 is about 16074.7878679627. The cubic root of 258398805 is about 636.9375215460.

The spelling of 258398805 in words is "two hundred fifty-eight million, three hundred ninety-eight thousand, eight hundred five".